diff --git a/keyboards/underscore33/keymaps/default/readme.md b/keyboards/underscore33/keymaps/default/readme.md
deleted file mode 100644
index 7ef72915ed..0000000000
--- a/keyboards/underscore33/keymaps/default/readme.md
+++ /dev/null
@@ -1,5 +0,0 @@
-![_33 layout Image](https://i.imgur.com/1vxmk0F.png)
-
-# Default _33 Layout
-
-This is the recommended default layout. It is not a fully functional layout without backspace, tab, esc and so on. It is recommended to use combos to access the additional modifiers when using the large spacebar layout option, however combos are not enabled in the default firmware.
diff --git a/keyboards/underscore33/readme.md b/keyboards/underscore33/readme.md
index 153329d84e..7cc2f9f411 100644
--- a/keyboards/underscore33/readme.md
+++ b/keyboards/underscore33/readme.md
@@ -2,14 +2,18 @@
 
 ![_33](https://i.imgur.com/0Wuf8aT.png)
 
-A little bitty 30% (10x4) ortholinear keyboard designed by tominabox1.  The board supports an RGB LED strip with DI on port B6. There is an error on the initial 25 PCBs that incorrectly indicates PF0 for the RGB. The appropriate port is commented out in config.h for proper LED support. 
+A little bitty 30% (10x4) ortholinear keyboard designed by tominabox1.  The R1 version of the board supports an RGB LED strip with DI on port B6. There is an error on the initial 25 PCBs that incorrectly indicates PF0 for the RGB. The R2 version is correctly labeled for RGB on D6. The appropriate port is commented out in config.h for proper LED support. 
 
 * Keyboard Maintainer: [TJ Campie](https://github.com/tominabox1)
-* Hardware Supported: _33 PCB and Plate limited buy (Open source available ca. Apirl 2020)
+* Hardware Supported: [_33 r1 and r2 PCBs](https://github.com/tominabox1/_33-Keyboard)
 * Hardware Availability: [3D printed open sourced](https://github.com/tominabox1/_33-Keyboard)
 
 Make example for this keyboard (after setting up your build environment):
 
-    make underscore33:default
+    make underscore33/rev2:default
+
+Flashing example for this keyboard:
+
+    make underscore33/rev2:default:flash
 
 See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
diff --git a/keyboards/underscore33/config.h b/keyboards/underscore33/rev1/config.h
similarity index 60%
rename from keyboards/underscore33/config.h
rename to keyboards/underscore33/rev1/config.h
index 5733f30d00..8bdb802bde 100644
--- a/keyboards/underscore33/config.h
+++ b/keyboards/underscore33/rev1/config.h
@@ -1,10 +1,25 @@
+/* Copyright 2020 tominabox1
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 #pragma once
 
 #include "config_common.h"
 
 /* USB Device descriptor parameter */
-#define VENDOR_ID 0xFEED
-#define PRODUCT_ID 0x6A50
+#define VENDOR_ID 0x7431
+#define PRODUCT_ID 0x3301 // _33 rev1
 #define DEVICE_VER 0x0001
 #define MANUFACTURER tominabox1
 #define PRODUCT underscore33
diff --git a/keyboards/underscore33/rev1/info.json b/keyboards/underscore33/rev1/info.json
new file mode 100644
index 0000000000..9460a6f8c4
--- /dev/null
+++ b/keyboards/underscore33/rev1/info.json
@@ -0,0 +1,16 @@
+{
+  "keyboard_name": "underscore33",
+  "url": "",
+  "maintainer": "tominabox1",
+  "width": 10,
+  "height": 4,
+  "layouts": {
+      "LAYOUT_33_big_space": {
+          "layout": [{"label":"Q", "x":0, "y":0}, {"label":"W", "x":1, "y":0}, {"label":"E", "x":2, "y":0}, {"label":"R", "x":3, "y":0}, {"label":"T", "x":4, "y":0}, {"label":"Y", "x":5, "y":0}, {"label":"U", "x":6, "y":0}, {"label":"I", "x":7, "y":0}, {"label":"O", "x":8, "y":0}, {"label":"P", "x":9, "y":0},{"label":"A", "x":0, "y":1}, {"label":"S", "x":1, "y":1}, {"label":"D", "x":2, "y":1}, {"label":"F", "x":3, "y":1}, {"label":"G", "x":4, "y":1}, {"label":"H", "x":5, "y":1}, {"label":"J", "x":6, "y":1}, {"label":"K", "x":7, "y":1}, {"label":"L", "x":8, "y":1}, {"label":";", "x":9, "y":1}, {"label":"Z", "x":0, "y":2}, {"label":"X", "x":1, "y":2}, {"label":"C", "x":2, "y":2}, {"label":"V", "x":3, "y":2}, {"label":"B", "x":4, "y":2}, {"label":"N", "x":5, "y":2}, {"label":"M", "x":6, "y":2}, {"label":"<", "x":7, "y":2}, {"label":">", "x":8, "y":2}, {"label":"?", "x":9, "y":2}, {"label":"", "x":0.65, "y":3, "w":1.25}, {"label":"", "x":1.9, "y":3, "w":6.25}, {"label":"", "x":8.15, "y":3, "w":1.25}]
+      },
+
+      "LAYOUT_33_tri_split": {
+          "layout": [{"label":"Q", "x":0, "y":0}, {"label":"W", "x":1, "y":0}, {"label":"E", "x":2, "y":0}, {"label":"R", "x":3, "y":0}, {"label":"T", "x":4, "y":0}, {"label":"Y", "x":5, "y":0}, {"label":"U", "x":6, "y":0}, {"label":"I", "x":7, "y":0}, {"label":"O", "x":8, "y":0}, {"label":"P", "x":9, "y":0}, {"label":"A", "x":0, "y":1}, {"label":"S", "x":1, "y":1}, {"label":"D", "x":2, "y":1}, {"label":"F", "x":3, "y":1}, {"label":"G", "x":4, "y":1}, {"label":"H", "x":5, "y":1}, {"label":"J", "x":6, "y":1}, {"label":"K", "x":7, "y":1}, {"label":"L", "x":8, "y":1}, {"label":";", "x":9, "y":1}, {"label":"Z", "x":0, "y":2}, {"label":"X", "x":1, "y":2}, {"label":"C", "x":2, "y":2}, {"label":"V", "x":3, "y":2}, {"label":"B", "x":4, "y":2}, {"label":"N", "x":5, "y":2}, {"label":"M", "x":6, "y":2}, {"label":"<", "x":7, "y":2}, {"label":">", "x":8, "y":2}, {"label":"?", "x":9, "y":2}, {"label":"", "x":0.65, "y":3, "w":1.25}, {"label":"", "x":1.9, "y":3, "w":2.25}, {"label":"", "x":4.15, "y":3, "w":1.75}, {"label":"", "x":5.9, "y":3, "w":2.25}, {"label":"", "x":8.15, "y":3, "w":1.25}]
+      }
+  }
+}
diff --git a/keyboards/underscore33/rev1/keymaps/default/config.h b/keyboards/underscore33/rev1/keymaps/default/config.h
new file mode 100644
index 0000000000..5708a439ac
--- /dev/null
+++ b/keyboards/underscore33/rev1/keymaps/default/config.h
@@ -0,0 +1,5 @@
+#pragma once
+
+/* Combos */
+#define COMBO_COUNT 5
+#define COMBO_TERM 50
diff --git a/keyboards/underscore33/rev1/keymaps/default/keymap.c b/keyboards/underscore33/rev1/keymaps/default/keymap.c
new file mode 100644
index 0000000000..148e840fa5
--- /dev/null
+++ b/keyboards/underscore33/rev1/keymaps/default/keymap.c
@@ -0,0 +1,86 @@
+/* Copyright 2020 tominabox1
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+enum layers{
+  _BASE,
+  _NUM_SYM,
+  _NAV
+};
+
+enum custom_keycodes{
+  RGBRST = SAFE_RANGE,
+};
+
+#define KC_NUM_SPC LT(_NUM_SYM, KC_SPC)
+#define KC_NAV_ENT LT(_NAV, KC_ENT)
+#define KC_GA LGUI_T(KC_A)
+#define KC_AS LALT_T(KC_S)
+#define KC_CD LCTL_T(KC_D)
+#define KC_SF LSFT_T(KC_F)
+#define KC_SJ RSFT_T(KC_J)
+#define KC_CK RCTL_T(KC_K)
+#define KC_AL RALT_T(KC_L)
+#define KC_GSCLN RGUI_T(KC_SCLN)
+
+enum combo_events {
+  COMBO_BSPC,
+  COMBO_NUMBAK,
+  COMBO_TAB,
+  COMBO_ESC,
+  COMBO_DEL,
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [_BASE] = LAYOUT_33_split_space(
+    KC_Q,   KC_W,   KC_E,   KC_R,   KC_T,   KC_Y,   KC_U,    KC_I,   KC_O,     KC_P,
+   KC_GA,  KC_AS,  KC_CD,  KC_SF,   KC_G,   KC_H,  KC_SJ,   KC_CK,  KC_AL, KC_GSCLN,
+    KC_Z,   KC_X,   KC_C,   KC_V,   KC_B,   KC_N,   KC_M, KC_COMM, KC_DOT,  KC_SLSH,
+                 KC_LCTL, KC_NAV_ENT, KC_RGUI, KC_NUM_SPC, KC_RCTL
+  ),
+
+  [_NUM_SYM] = LAYOUT_33_split_space(
+       KC_1,     KC_2,     KC_3,     KC_4,      KC_5,     KC_6,     KC_7,     KC_8,     KC_9,     KC_0,
+    KC_EXLM,    KC_AT,  KC_HASH,   KC_DLR,   KC_PERC,  KC_CIRC,  KC_AMPR,  KC_ASTR, KC_EQUAL,  KC_MINS,
+    KC_BSLS,  KC_LCBR,  KC_LBRC,  KC_LPRN,   KC_UNDS,  KC_RPRN,  KC_RBRC,  KC_RCBR,   KC_DOT,   KC_GRV,
+                  KC_TRNS,  KC_TRNS, KC_TRNS,   KC_TRNS,   KC_TRNS
+  ),
+
+  [_NAV] = LAYOUT_33_split_space(
+      RESET,   RGBRST,  AG_NORM,  AG_SWAP,  DEBUG,   KC_GRV,  KC_PGDN,    KC_UP,  KC_PGUP,  KC_SCLN,
+    RGB_TOG,  RGB_HUI,  RGB_SAI,  RGB_VAI,  KC_NO,  KC_HOME,  KC_LEFT,  KC_DOWN,  KC_RGHT,   KC_END,
+    RGB_MOD,  RGB_HUD,  RGB_SAD,  RGB_VAD,  KC_NO,  KC_MINS,    KC_RO,  KC_COMM,   KC_DOT,  KC_BSLS,
+                   KC_TRNS, KC_TRNS, KC_TRNS,   KC_TRNS,   KC_TRNS
+  ),
+};
+
+
+#ifdef COMBO_ENABLE
+const uint16_t PROGMEM combo_bspc[] = {KC_O, KC_P, COMBO_END};
+const uint16_t PROGMEM combo_numbak[] = {KC_0, KC_9, COMBO_END};
+const uint16_t PROGMEM combo_tab[] = {KC_Q, KC_W, COMBO_END};
+const uint16_t PROGMEM combo_esc[] = {KC_E, KC_W, COMBO_END};
+const uint16_t PROGMEM combo_del[] = {KC_MINS, KC_EQL, COMBO_END};
+
+combo_t key_combos[COMBO_COUNT] = {
+  [COMBO_BSPC] = COMBO(combo_bspc,KC_BSPC),
+  [COMBO_NUMBAK] = COMBO(combo_numbak,KC_BSPC),
+  [COMBO_TAB] = COMBO(combo_tab,KC_TAB),
+  [COMBO_ESC] = COMBO(combo_esc,KC_ESC),
+  [COMBO_DEL] = COMBO(combo_del,KC_DEL),
+
+};
+#endif
diff --git a/keyboards/underscore33/rev1/keymaps/default/readme.md b/keyboards/underscore33/rev1/keymaps/default/readme.md
new file mode 100644
index 0000000000..908b3e04ab
--- /dev/null
+++ b/keyboards/underscore33/rev1/keymaps/default/readme.md
@@ -0,0 +1,3 @@
+# Default _33 Rev1 Layout
+
+This is the recommended default layout. 
diff --git a/keyboards/underscore33/rev1/keymaps/default/rules.mk b/keyboards/underscore33/rev1/keymaps/default/rules.mk
new file mode 100644
index 0000000000..ab1e438182
--- /dev/null
+++ b/keyboards/underscore33/rev1/keymaps/default/rules.mk
@@ -0,0 +1 @@
+COMBO_ENABLE = yes
diff --git a/keyboards/underscore33/rev1/keymaps/via/keymap.c b/keyboards/underscore33/rev1/keymaps/via/keymap.c
new file mode 100644
index 0000000000..03e209fd15
--- /dev/null
+++ b/keyboards/underscore33/rev1/keymaps/via/keymap.c
@@ -0,0 +1,46 @@
+/* Copyright 2020 tominabox1
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [0] = LAYOUT_33_split_space(
+    KC_Q,   KC_W,   KC_E,   KC_R,   KC_T,   KC_Y,   KC_U,    KC_I,   KC_O,     KC_P,
+    KC_A,  KC_S,  KC_D,  KC_F,   KC_G,   KC_H,  KC_J,   KC_K,  KC_L, KC_ENT,
+    KC_Z,   KC_X,   KC_C,   KC_V,   KC_B,   KC_N,   KC_M, KC_COMM, KC_DOT,  KC_SLSH,
+    KC_LCTL, KC_LALT, KC_SPACE, KC_RGUI, KC_RALT
+  ),
+
+  [1] = LAYOUT_33_split_space(
+    KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,      KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_0,
+    KC_TRNS,    KC_TRNS,  KC_TRNS,   KC_TRNS,   KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS, KC_TRNS,  KC_TRNS,
+    KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   KC_TRNS,   KC_TRNS,
+    KC_TRNS,   KC_TRNS,   KC_TRNS,   KC_TRNS,   KC_TRNS
+  ),
+
+  [2] = LAYOUT_33_split_space(
+    KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,      KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_0,
+    KC_TRNS,    KC_TRNS,  KC_TRNS,   KC_TRNS,   KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS, KC_TRNS,  KC_TRNS,
+    KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   KC_TRNS,   KC_TRNS,
+    KC_TRNS,   KC_TRNS,  KC_TRNS,   KC_TRNS,   KC_TRNS
+  ),
+  [3] = LAYOUT_33_split_space(
+    KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,      KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_0,
+    KC_TRNS,    KC_TRNS,  KC_TRNS,   KC_TRNS,   KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS, KC_TRNS,  KC_TRNS,
+    KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   KC_TRNS,   KC_TRNS,
+    KC_TRNS,   KC_TRNS,  KC_TRNS,   KC_TRNS,   KC_TRNS
+  ),
+
+};
diff --git a/keyboards/underscore33/rev1/keymaps/via/readme.md b/keyboards/underscore33/rev1/keymaps/via/readme.md
new file mode 100644
index 0000000000..a63a8342e8
--- /dev/null
+++ b/keyboards/underscore33/rev1/keymaps/via/readme.md
@@ -0,0 +1 @@
+# VIA _33 Rev1 Layout
diff --git a/keyboards/underscore33/rev1/keymaps/via/rules.mk b/keyboards/underscore33/rev1/keymaps/via/rules.mk
new file mode 100644
index 0000000000..1e5b99807c
--- /dev/null
+++ b/keyboards/underscore33/rev1/keymaps/via/rules.mk
@@ -0,0 +1 @@
+VIA_ENABLE = yes
diff --git a/keyboards/underscore33/rev1/rev1.c b/keyboards/underscore33/rev1/rev1.c
new file mode 100644
index 0000000000..4f763dbb49
--- /dev/null
+++ b/keyboards/underscore33/rev1/rev1.c
@@ -0,0 +1,16 @@
+/* Copyright 2020 tominabox1
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "rev1.h"
diff --git a/keyboards/underscore33/underscore33.h b/keyboards/underscore33/rev1/rev1.h
similarity index 60%
rename from keyboards/underscore33/underscore33.h
rename to keyboards/underscore33/rev1/rev1.h
index 5c774cfa85..12cc7d9fd8 100644
--- a/keyboards/underscore33/underscore33.h
+++ b/keyboards/underscore33/rev1/rev1.h
@@ -1,3 +1,18 @@
+/* Copyright 2020 tominabox1
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 #pragma once
 
 #include "quantum.h"
diff --git a/keyboards/underscore33/rev1/rules.mk b/keyboards/underscore33/rev1/rules.mk
new file mode 100644
index 0000000000..32981133b2
--- /dev/null
+++ b/keyboards/underscore33/rev1/rules.mk
@@ -0,0 +1,22 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = atmel-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = yes           # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output
diff --git a/keyboards/underscore33/rev2/config.h b/keyboards/underscore33/rev2/config.h
new file mode 100644
index 0000000000..0e965de231
--- /dev/null
+++ b/keyboards/underscore33/rev2/config.h
@@ -0,0 +1,62 @@
+/* Copyright 2020 tominabox1
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID 0x7431
+#define PRODUCT_ID 0x3302 // _33 rev2
+#define DEVICE_VER 0x0002
+#define MANUFACTURER tominabox1
+#define PRODUCT underscore33
+
+/* key matrix size */
+#define MATRIX_ROWS 4
+#define MATRIX_COLS 10
+
+/*
+ * Keyboard Matrix Assignments
+ *
+ * Change this to how you wired your keyboard
+ * COLS: AVR pins used for columns, left to right
+ * ROWS: AVR pins used for rows, top to bottom
+ * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
+ *                  ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
+ *
+ */
+
+#define MATRIX_ROW_PINS { C4, B0, B1, B2 }
+#define MATRIX_COL_PINS { C5, C6, C7, B7, B6, B5, B4, B3, C2, D0 }
+#define UNUSED_PINS
+
+/* COL2ROW, ROW2COL*/
+#define DIODE_DIRECTION ROW2COL
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCE 5
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+#define LOCKING_RESYNC_ENABLE
+
+#ifdef RGBLIGHT_ENABLE
+#define RGB_DI_PIN D6
+   #define RGBLED_NUM 12
+   #define RGBLIGHT_ANIMATIONS
+#endif
+
diff --git a/keyboards/underscore33/info.json b/keyboards/underscore33/rev2/info.json
similarity index 90%
rename from keyboards/underscore33/info.json
rename to keyboards/underscore33/rev2/info.json
index 4e97a63802..567270ec72 100644
--- a/keyboards/underscore33/info.json
+++ b/keyboards/underscore33/rev2/info.json
@@ -10,7 +10,7 @@
       },
 
       "LAYOUT_33_split_space": {
-          "layout": [{"label":"Q", "x":0, "y":0}, {"label":"W", "x":1, "y":0}, {"label":"E", "x":2, "y":0}, {"label":"R", "x":3, "y":0}, {"label":"T", "x":4, "y":0}, {"label":"Y", "x":5, "y":0}, {"label":"U", "x":6, "y":0}, {"label":"I", "x":7, "y":0}, {"label":"O", "x":8, "y":0}, {"label":"P", "x":9, "y":0},{"label":"A", "x":0, "y":1}, {"label":"S", "x":1, "y":1}, {"label":"D", "x":2, "y":1}, {"label":"F", "x":3, "y":1}, {"label":"G", "x":4, "y":1}, {"label":"H", "x":5, "y":1}, {"label":"J", "x":6, "y":1}, {"label":"K", "x":7, "y":1}, {"label":"L", "x":8, "y":1}, {"label":";", "x":9, "y":1}, {"label":"Z", "x":0, "y":2}, {"label":"X", "x":1, "y":2}, {"label":"C", "x":2, "y":2}, {"label":"V", "x":3, "y":2}, {"label":"B", "x":4, "y":2}, {"label":"N", "x":5, "y":2}, {"label":"M", "x":6, "y":2}, {"label":"<", "x":7, "y":2}, {"label":">", "x":8, "y":2}, {"label":"?", "x":9, "y":2}, {"label":"", "x":0.65, "y":3, "w":1.25}, {"label":"", "x":1.9, "y":3, "w":2.25}, {"label":"", "x":4.15, "y":3, "w":1.75}, {"label":"", "x":5.9, "y":3, "w":2.25}, {"label":"", "x":8.15, "y":3, "w":1.25}]
+          "layout": [{"label":"Q", "x":0, "y":0}, {"label":"W", "x":1, "y":0}, {"label":"E", "x":2, "y":0}, {"label":"R", "x":3, "y":0}, {"label":"T", "x":4, "y":0}, {"label":"Y", "x":5, "y":0}, {"label":"U", "x":6, "y":0}, {"label":"I", "x":7, "y":0}, {"label":"O", "x":8, "y":0}, {"label":"P", "x":9, "y":0},{"label":"A", "x":0, "y":1}, {"label":"S", "x":1, "y":1}, {"label":"D", "x":2, "y":1}, {"label":"F", "x":3, "y":1}, {"label":"G", "x":4, "y":1}, {"label":"H", "x":5, "y":1}, {"label":"J", "x":6, "y":1}, {"label":"K", "x":7, "y":1}, {"label":"L", "x":8, "y":1}, {"label":";", "x":9, "y":1}, {"label":"Z", "x":0, "y":2}, {"label":"X", "x":1, "y":2}, {"label":"C", "x":2, "y":2}, {"label":"V", "x":3, "y":2}, {"label":"B", "x":4, "y":2}, {"label":"N", "x":5, "y":2}, {"label":"M", "x":6, "y":2}, {"label":"<", "x":7, "y":2}, {"label":">", "x":8, "y":2}, {"label":"?", "x":9, "y":2}, {"label":"", "x":0.65, "y":3, "w":1}, {"label":"", "x":1.65, "y":3, "w":1.25}, {"label":"", "x":2.9, "y":3, "w":2.25}, {"label":"", "x":5.15, "y":3, "w":2}, {"label":"", "x":7.15, "y":3, "w":1.25}, {"label":"", "x":8.4, "y":3, "w":1}]
       }
   }
 }
diff --git a/keyboards/underscore33/rev2/keymaps/default/config.h b/keyboards/underscore33/rev2/keymaps/default/config.h
new file mode 100644
index 0000000000..5708a439ac
--- /dev/null
+++ b/keyboards/underscore33/rev2/keymaps/default/config.h
@@ -0,0 +1,5 @@
+#pragma once
+
+/* Combos */
+#define COMBO_COUNT 5
+#define COMBO_TERM 50
diff --git a/keyboards/underscore33/keymaps/default/keymap.c b/keyboards/underscore33/rev2/keymaps/default/keymap.c
similarity index 50%
rename from keyboards/underscore33/keymaps/default/keymap.c
rename to keyboards/underscore33/rev2/keymaps/default/keymap.c
index 8fab8623a2..32a6f48639 100644
--- a/keyboards/underscore33/keymaps/default/keymap.c
+++ b/keyboards/underscore33/rev2/keymaps/default/keymap.c
@@ -1,3 +1,18 @@
+/* Copyright 2020 tominabox1
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 #include QMK_KEYBOARD_H
 
 enum layers{
@@ -11,6 +26,7 @@ enum custom_keycodes{
 };
 
 #define KC_NUM_SPC LT(_NUM_SYM, KC_SPC)
+#define KC_NAV_ENT LT(_NAV, KC_ENT)
 #define KC_GA LGUI_T(KC_A)
 #define KC_AS LALT_T(KC_S)
 #define KC_CD LCTL_T(KC_D)
@@ -20,25 +36,51 @@ enum custom_keycodes{
 #define KC_AL RALT_T(KC_L)
 #define KC_GSCLN RGUI_T(KC_SCLN)
 
+enum combo_events {
+  COMBO_BSPC,
+  COMBO_NUMBAK,
+  COMBO_TAB,
+  COMBO_ESC,
+  COMBO_DEL,
+};
+
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   [_BASE] = LAYOUT_33_split_space(
     KC_Q,   KC_W,   KC_E,   KC_R,   KC_T,   KC_Y,   KC_U,    KC_I,   KC_O,     KC_P,
    KC_GA,  KC_AS,  KC_CD,  KC_SF,   KC_G,   KC_H,  KC_SJ,   KC_CK,  KC_AL, KC_GSCLN,
     KC_Z,   KC_X,   KC_C,   KC_V,   KC_B,   KC_N,   KC_M, KC_COMM, KC_DOT,  KC_SLSH,
-                 KC_LCTL, KC_LALT, KC_NUM_SPC, MO(_NAV), KC_RGUI
+                 KC_LCTL, KC_LALT, KC_NAV_ENT, KC_NUM_SPC, KC_RGUI, KC_RCTL
   ),
 
   [_NUM_SYM] = LAYOUT_33_split_space(
        KC_1,     KC_2,     KC_3,     KC_4,      KC_5,     KC_6,     KC_7,     KC_8,     KC_9,     KC_0,
     KC_EXLM,    KC_AT,  KC_HASH,   KC_DLR,   KC_PERC,  KC_CIRC,  KC_AMPR,  KC_ASTR, KC_EQUAL,  KC_MINS,
     KC_BSLS,  KC_LCBR,  KC_LBRC,  KC_LPRN,   KC_UNDS,  KC_RPRN,  KC_RBRC,  KC_RCBR,   KC_DOT,   KC_GRV,
-                  KC_TRNS,   KC_TRNS,  KC_TRNS, KC_TRNS,   KC_TRNS
+                  KC_TRNS,   KC_TRNS,  KC_TRNS, KC_TRNS,   KC_TRNS,   KC_TRNS
   ),
 
   [_NAV] = LAYOUT_33_split_space(
       RESET,   RGBRST,  AG_NORM,  AG_SWAP,  DEBUG,   KC_GRV,  KC_PGDN,    KC_UP,  KC_PGUP,  KC_SCLN,
     RGB_TOG,  RGB_HUI,  RGB_SAI,  RGB_VAI,  KC_NO,  KC_HOME,  KC_LEFT,  KC_DOWN,  KC_RGHT,   KC_END,
     RGB_MOD,  RGB_HUD,  RGB_SAD,  RGB_VAD,  KC_NO,  KC_MINS,    KC_RO,  KC_COMM,   KC_DOT,  KC_BSLS,
-                   KC_TRNS,  KC_TRNS,  KC_TRNS, KC_TRNS,   KC_TRNS
+                   KC_TRNS,  KC_TRNS,  KC_TRNS, KC_TRNS,   KC_TRNS,   KC_TRNS
   ),
 };
+
+
+#ifdef COMBO_ENABLE
+const uint16_t PROGMEM combo_bspc[] = {KC_O, KC_P, COMBO_END};
+const uint16_t PROGMEM combo_numbak[] = {KC_0, KC_9, COMBO_END};
+const uint16_t PROGMEM combo_tab[] = {KC_Q, KC_W, COMBO_END};
+const uint16_t PROGMEM combo_esc[] = {KC_E, KC_W, COMBO_END};
+const uint16_t PROGMEM combo_del[] = {KC_MINS, KC_EQL, COMBO_END};
+
+combo_t key_combos[COMBO_COUNT] = {
+  [COMBO_BSPC] = COMBO(combo_bspc,KC_BSPC),
+  [COMBO_NUMBAK] = COMBO(combo_numbak,KC_BSPC),
+  [COMBO_TAB] = COMBO(combo_tab,KC_TAB),
+  [COMBO_ESC] = COMBO(combo_esc,KC_ESC),
+  [COMBO_DEL] = COMBO(combo_del,KC_DEL),
+
+};
+#endif
diff --git a/keyboards/underscore33/rev2/keymaps/default/readme.md b/keyboards/underscore33/rev2/keymaps/default/readme.md
new file mode 100644
index 0000000000..fb48598891
--- /dev/null
+++ b/keyboards/underscore33/rev2/keymaps/default/readme.md
@@ -0,0 +1,3 @@
+# Default _33 Rev2 Layout
+
+This is the recommended default layout. 
diff --git a/keyboards/underscore33/rev2/keymaps/default/rules.mk b/keyboards/underscore33/rev2/keymaps/default/rules.mk
new file mode 100644
index 0000000000..ab1e438182
--- /dev/null
+++ b/keyboards/underscore33/rev2/keymaps/default/rules.mk
@@ -0,0 +1 @@
+COMBO_ENABLE = yes
diff --git a/keyboards/underscore33/rev2/keymaps/via/keymap.c b/keyboards/underscore33/rev2/keymaps/via/keymap.c
new file mode 100644
index 0000000000..9464b0cdb8
--- /dev/null
+++ b/keyboards/underscore33/rev2/keymaps/via/keymap.c
@@ -0,0 +1,46 @@
+/* Copyright 2020 tominabox1
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [0] = LAYOUT_33_split_space(
+    KC_Q,   KC_W,   KC_E,   KC_R,   KC_T,   KC_Y,   KC_U,    KC_I,   KC_O,     KC_P,
+    KC_A,  KC_S,  KC_D,  KC_F,   KC_G,   KC_H,  KC_J,   KC_K,  KC_L, KC_ENT,
+    KC_Z,   KC_X,   KC_C,   KC_V,   KC_B,   KC_N,   KC_M, KC_COMM, KC_DOT,  KC_SLSH,
+    KC_LCTL, KC_LALT, KC_SPACE, KC_SPACE, KC_RGUI, KC_RALT
+  ),
+
+  [1] = LAYOUT_33_split_space(
+    KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,      KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_0,
+    KC_TRNS,    KC_TRNS,  KC_TRNS,   KC_TRNS,   KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS, KC_TRNS,  KC_TRNS,
+    KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   KC_TRNS,   KC_TRNS,
+    KC_TRNS,   KC_TRNS,  KC_TRNS, KC_TRNS,   KC_TRNS,   KC_TRNS
+  ),
+
+  [2] = LAYOUT_33_split_space(
+    KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,      KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_0,
+    KC_TRNS,    KC_TRNS,  KC_TRNS,   KC_TRNS,   KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS, KC_TRNS,  KC_TRNS,
+    KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   KC_TRNS,   KC_TRNS,
+    KC_TRNS,   KC_TRNS,  KC_TRNS, KC_TRNS,   KC_TRNS,   KC_TRNS
+  ),
+  [3] = LAYOUT_33_split_space(
+    KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,      KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_TRNS,     KC_0,
+    KC_TRNS,    KC_TRNS,  KC_TRNS,   KC_TRNS,   KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS, KC_TRNS,  KC_TRNS,
+    KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   KC_TRNS,   KC_TRNS,
+    KC_TRNS,   KC_TRNS,  KC_TRNS, KC_TRNS,   KC_TRNS,   KC_TRNS
+  ),
+
+};
diff --git a/keyboards/underscore33/rev2/keymaps/via/readme.md b/keyboards/underscore33/rev2/keymaps/via/readme.md
new file mode 100644
index 0000000000..7a6d4cf2f7
--- /dev/null
+++ b/keyboards/underscore33/rev2/keymaps/via/readme.md
@@ -0,0 +1 @@
+# VIA Layout
diff --git a/keyboards/underscore33/rev2/keymaps/via/rules.mk b/keyboards/underscore33/rev2/keymaps/via/rules.mk
new file mode 100644
index 0000000000..16d33cd89f
--- /dev/null
+++ b/keyboards/underscore33/rev2/keymaps/via/rules.mk
@@ -0,0 +1,2 @@
+VIA_ENABLE = yes
+
diff --git a/keyboards/underscore33/rev2/rev2.c b/keyboards/underscore33/rev2/rev2.c
new file mode 100644
index 0000000000..e89b2938f9
--- /dev/null
+++ b/keyboards/underscore33/rev2/rev2.c
@@ -0,0 +1,16 @@
+/* Copyright 2020 tominabox1
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "rev2.h"
diff --git a/keyboards/underscore33/rev2/rev2.h b/keyboards/underscore33/rev2/rev2.h
new file mode 100644
index 0000000000..34e6e6b7a9
--- /dev/null
+++ b/keyboards/underscore33/rev2/rev2.h
@@ -0,0 +1,46 @@
+/* Copyright 2020 tominabox1
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include "quantum.h"
+
+#define XXX KC_NO
+
+#define LAYOUT_33_big_space( \
+  K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, \
+  K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, \
+  K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, \
+       K31,           K34,                K38       \
+) \
+{ \
+  { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09  }, \
+  { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19  }, \
+  { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29  }, \
+  { XXX, K31, XXX, XXX, K34, XXX, XXX, XXX, K38, XXX  }  \
+}
+
+#define LAYOUT_33_split_space( \
+  K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, \
+  K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, \
+  K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, \
+       K31, K32, K33,      K35,      K37, K38       \
+) \
+{ \
+  { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09  }, \
+  { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19  }, \
+  { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29  }, \
+  { XXX, K31, K32, K33, XXX, K35, XXX, K37, K38, XXX  }  \
+}
diff --git a/keyboards/underscore33/rev2/rules.mk b/keyboards/underscore33/rev2/rules.mk
new file mode 100644
index 0000000000..d226af58ed
--- /dev/null
+++ b/keyboards/underscore33/rev2/rules.mk
@@ -0,0 +1,23 @@
+# MCU name
+MCU = atmega32u2
+
+# Bootloader selection
+BOOTLOADER = atmel-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = no        # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = yes           # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output
+
diff --git a/keyboards/underscore33/rules.mk b/keyboards/underscore33/rules.mk
index a5c12fdadb..b86f18e114 100644
--- a/keyboards/underscore33/rules.mk
+++ b/keyboards/underscore33/rules.mk
@@ -1,25 +1 @@
-# MCU name
-MCU = atmega32u4
-
-# Bootloader selection
-#   Teensy       halfkay
-#   Pro Micro    caterina
-#   Atmel DFU    atmel-dfu
-#   LUFA DFU     lufa-dfu
-#   QMK DFU      qmk-dfu
-#   ATmega32A    bootloadHID
-#   ATmega328P   USBasp
-BOOTLOADER = atmel-dfu
-
-BOOTMAGIC_ENABLE = lite       # Virtual DIP switch configuration
-MOUSEKEY_ENABLE = yes       # Mouse keys
-EXTRAKEY_ENABLE = yes       # Audio control and System control
-CONSOLE_ENABLE = no        # Console for debug
-COMMAND_ENABLE = no        # Commands for debug and configuration
-# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
-SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
-# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
-NKRO_ENABLE = yes            # USB Nkey Rollover
-BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
-RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
-TAP_DANCE_ENABLE = no
+DEFAULT_FOLDER = underscore33/rev1
diff --git a/keyboards/underscore33/underscore33.c b/keyboards/underscore33/underscore33.c
deleted file mode 100644
index 9d690be9ab..0000000000
--- a/keyboards/underscore33/underscore33.c
+++ /dev/null
@@ -1 +0,0 @@
-#include "underscore33.h"