[Keyboard] Rebound rev3 (#9101)

* more stoof

* readme update

* reverting keymap

* re-adding userspace

* new userspace needed

* no want 0 under thumb

* gettin fancier with my knob

* macro fix

* had pins for oled ver

* wait, these are the right pins

* reduntant line

* image fix

* get highest layer every day

* whoops

* correct rev name in json

* a few good catches

* what I had planned

10 files changed, 507 insertions, 6 deletions

diff --git a/keyboards/montsinger/rebound/readme.md b/keyboards/montsinger/rebound/readme.md
index 024b4a96b7..1beafaf1b1 100755
--- a/keyboards/montsinger/rebound/readme.md
+++ b/keyboards/montsinger/rebound/readme.md
@@ -1,16 +1,17 @@
 # Rebound
 
-![Rebound](https://imgur.com/zMPhNmm.jpg)
+![Rebound](https://i.imgur.com/IoV64hC.jpg)
 
-A conjoined-split 40% 4x12 ortholinear keyboard made and sold by Montsinger. [More info on Montsinger.net](https://montsinger.net).
+A conjoined-split 40% ortholinear keyboard made and sold by Montsinger. [More info on Montsinger.net](https://montsinger.net).
 
 * Keyboard Maintainer: [Rossman360](https://github.com/rossman360)
-* Hardware Supported: Rebound rev1 or rev2; Pro Micro or Elite-C
+* Hardware Supported: Rebound rev1 rev2 or rev3; Pro Micro or Elite-C
 * Hardware Availability: [Montsinger.net](https://montsinger.net)
 
 Make example for this keyboard (after setting up your build environment):
 
     make montsinger/rebound/rev1:default # for rev1
     make montsinger/rebound/rev2:default # for rev2
+    make montsinger/rebound/rev3:default # for rev3
 
-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)
\ No newline at end of file
+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/montsinger/rebound/rebound.h b/keyboards/montsinger/rebound/rebound.h
index c9fc262778..848316a366 100644
--- a/keyboards/montsinger/rebound/rebound.h
+++ b/keyboards/montsinger/rebound/rebound.h
@@ -22,4 +22,6 @@
     #include "rev1.h"
 #elif defined(KEYBOARD_montsinger_rebound_rev2)
     #include "rev2.h"
+#elif defined(KEYBOARD_montsinger_rebound_rev3)
+    #include "rev3.h"
 #endif
diff --git a/keyboards/montsinger/rebound/rev2/keymaps/rossman360/keymap.c b/keyboards/montsinger/rebound/rev2/keymaps/rossman360/keymap.c
index 23bd7e4ec9..10681eba6b 100644
--- a/keyboards/montsinger/rebound/rev2/keymaps/rossman360/keymap.c
+++ b/keyboards/montsinger/rebound/rev2/keymaps/rossman360/keymap.c
@@ -49,9 +49,9 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   ),
 
 [_NUM] = LAYOUT_all(
-    _______, KC_1   , KC_2   , KC_3   , KC_4   , KC_5   ,          KC_6   , KC_7   , KC_8   , KC_9   , KC_MINS, KC_EQL, 
+    _______, KC_1   , KC_2   , KC_3   , KC_4   , KC_5   ,          KC_6   , KC_7   , KC_8   , KC_9   , KC_MINS, KC_EQL,
     KC_CAPS, _______, _______, _______, _______, _______,          KC_MINS, KC_4   , KC_5   , KC_6   , KC_COLN, _______,
-    _______, _______, _______, _______, _______, KC_LBRC,          KC_RBRC, KC_1   , KC_2   , KC_3   , KC_BSLS, _______, 
+    _______, _______, _______, _______, _______, KC_LBRC,          KC_RBRC, KC_1   , KC_2   , KC_3   , KC_BSLS, _______,
     _______, _______, _______, KC_MUTE, KC_VOLD, KC_VOLU, KC_Y   , _______, _______, KC_0   , _______, _______, _______
   )
 };
diff --git a/keyboards/montsinger/rebound/rev3/config.h b/keyboards/montsinger/rebound/rev3/config.h
new file mode 100644
index 0000000000..6c85fab88b
--- /dev/null
+++ b/keyboards/montsinger/rebound/rev3/config.h
@@ -0,0 +1,65 @@
+/*
+Copyright 2020 Ross Montsinger
+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 0x552F
+#define DEVICE_VER 0x0002
+#define MANUFACTURER Montsinger
+#define PRODUCT Rebound
+#define DESCRIPTION "A conjoined Let's Split"
+
+/* key matrix size */
+
+#define MATRIX_ROWS 5
+#define MATRIX_COLS 12
+
+/*
+ * 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 { F4, F5, D1, D0, B0 }
+#define MATRIX_COL_PINS { D4, C6, D7, E6, B4, B5, B6, B2, B3, B1, F7, F6 }
+#define UNUSED_PINS { }
+
+#define ENCODERS_PAD_A { D3 }
+#define ENCODERS_PAD_B { D2 }
+
+/* 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
+
+/* Bootmagic Lite key configuration */
+// #define BOOTMAGIC_LITE_ROW 0
+// #define BOOTMAGIC_LITE_COLUMN 0
diff --git a/keyboards/montsinger/rebound/rev3/info.json b/keyboards/montsinger/rebound/rev3/info.json
new file mode 100644
index 0000000000..bf4a540b71
--- /dev/null
+++ b/keyboards/montsinger/rebound/rev3/info.json
@@ -0,0 +1,128 @@
+{
+    "keyboard":"montsinger/rebound/rev3",
+    "url": "https://montsinger.net",
+    "maintainer": "rossman360",
+    "width": 13,
+    "height": 4,
+    "layouts": {
+        "LAYOUT_all": {
+            "layout": [
+                {"x":0, "y":0},
+                {"x":1, "y":0},
+                {"x":2, "y":0},
+                {"x":3, "y":0},
+                {"x":4, "y":0},
+                {"x":5, "y":0},
+
+                {"x":7, "y":0},
+                {"x":8, "y":0},
+                {"x":9, "y":0},
+                {"x":10, "y":0},
+                {"x":11, "y":0},
+                {"x":12, "y":0},
+
+                {"x":0, "y":1},
+                {"x":1, "y":1},
+                {"x":2, "y":1},
+                {"x":3, "y":1},
+                {"x":4, "y":1},
+                {"x":5, "y":1},
+                {"x":6, "y":1},
+                {"x":7, "y":1},
+                {"x":8, "y":1},
+                {"x":9, "y":1},
+                {"x":10, "y":1},
+                {"x":11, "y":1},
+                {"x":12, "y":1},
+
+                {"x":0, "y":2},
+                {"x":1, "y":2},
+                {"x":2, "y":2},
+                {"x":3, "y":2},
+                {"x":4, "y":2},
+                {"x":5, "y":2},
+                {"x":6, "y":2},
+                {"x":7, "y":2},
+                {"x":8, "y":2},
+                {"x":9, "y":2},
+                {"x":10, "y":2},
+                {"x":11, "y":2},
+                {"x":12, "y":2},
+
+                {"x":0, "y":3},
+                {"x":1, "y":3},
+                {"x":2, "y":3},
+                {"x":3, "y":3},
+                {"x":4, "y":3},
+                {"x":5, "y":3},
+                {"x":6, "y":3},
+                {"x":7, "y":3},
+                {"x":8, "y":3},
+                {"x":9, "y":3},
+                {"x":10, "y":3},
+                {"x":11, "y":3},
+                {"x":12, "y":3}
+            ]
+        },
+        "LAYOUT_ortho_4x12": {
+            "layout": [
+
+                {"x":0, "y":0},
+                {"x":1, "y":0},
+                {"x":2, "y":0},
+                {"x":3, "y":0},
+                {"x":4, "y":0},
+                {"x":5, "y":0},
+
+                {"x":7, "y":0},
+                {"x":8, "y":0},
+                {"x":9, "y":0},
+                {"x":10, "y":0},
+                {"x":11, "y":0},
+                {"x":12, "y":0},
+
+                {"x":0, "y":1},
+                {"x":1, "y":1},
+                {"x":2, "y":1},
+                {"x":3, "y":1},
+                {"x":4, "y":1},
+                {"x":5, "y":1},
+
+                {"x":7, "y":1},
+                {"x":8, "y":1},
+                {"x":9, "y":1},
+                {"x":10, "y":1},
+                {"x":11, "y":1},
+                {"x":12, "y":1},
+
+                {"x":0, "y":2},
+                {"x":1, "y":2},
+                {"x":2, "y":2},
+                {"x":3, "y":2},
+                {"x":4, "y":2},
+                {"x":5, "y":2},
+
+                {"x":7, "y":2},
+                {"x":8, "y":2},
+                {"x":9, "y":2},
+                {"x":10, "y":2},
+                {"x":11, "y":2},
+                {"x":12, "y":2},
+
+                {"x":0, "y":3},
+                {"x":1, "y":3},
+                {"x":2, "y":3},
+                {"x":3, "y":3},
+                {"x":4, "y":3},
+                {"x":5, "y":3},
+
+                {"x":7, "y":3},
+                {"x":8, "y":3},
+                {"x":9, "y":3},
+                {"x":10, "y":3},
+                {"x":11, "y":3},
+                {"x":12, "y":3}
+            ]
+        }
+    }
+}
diff --git a/keyboards/montsinger/rebound/rev3/keymaps/default/keymap.c b/keyboards/montsinger/rebound/rev3/keymaps/default/keymap.c
new file mode 100644
index 0000000000..be038b1f53
--- /dev/null
+++ b/keyboards/montsinger/rebound/rev3/keymaps/default/keymap.c
@@ -0,0 +1,102 @@
+#include QMK_KEYBOARD_H
+
+// Each layer gets a name for readability, which is then used in the keymap matrix below.
+// The underscores don't mean anything - you can have a layer called STUFF or any other name.
+// Layer names don't all need to be of the same length, obviously, and you can also skip them
+// entirely and just use numbers.
+
+enum layer_names {
+  _QWERTY,
+  _COLEMAK,
+  _DVORAK,
+  _LOWER,
+  _RAISE,
+  _ADJUST
+};
+
+enum custom_keycodes {
+  QWERTY = SAFE_RANGE,
+  COLEMAK,
+  DVORAK
+};
+
+#define LOWER  MO(_LOWER)
+#define RAISE  MO(_RAISE)
+#define ADJUST MO(_ADJUST)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+[_QWERTY] = LAYOUT_all(
+   KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,            KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_BSPC,
+   KC_ESC,  KC_A,    KC_S,    KC_D,    KC_F,    KC_G,   KC_PGUP, KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,
+   KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,   KC_PGDN, KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_ENT ,
+   ADJUST,  KC_LCTL, KC_LALT, KC_LGUI, LOWER,   KC_SPC, KC_ENT,  KC_SPC,  RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT
+),
+
+[_COLEMAK] = LAYOUT_all(
+  KC_TAB,  KC_Q,    KC_W,    KC_F,    KC_P,    KC_G,             KC_J,    KC_L,    KC_U,    KC_Y,    KC_SCLN, KC_BSPC,
+  KC_ESC,  KC_A,    KC_R,    KC_S,    KC_T,    KC_D,   _______,  KC_H,    KC_N,    KC_E,    KC_I,    KC_O,    KC_QUOT,
+  KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,   _______,  KC_K,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_ENT ,
+  ADJUST,  KC_LCTL, KC_LALT, KC_LGUI, LOWER,   KC_SPC, _______,  KC_SPC,  RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT
+),
+
+[_DVORAK] = LAYOUT_all(
+  KC_TAB,  KC_QUOT, KC_COMM, KC_DOT,  KC_P,    KC_Y,             KC_F,    KC_G,    KC_C,    KC_R,    KC_L,    KC_BSPC,
+  KC_ESC,  KC_A,    KC_O,    KC_E,    KC_U,    KC_I,   _______,  KC_D,    KC_H,    KC_T,    KC_N,    KC_S,    KC_SLSH,
+  KC_LSFT, KC_SCLN, KC_Q,    KC_J,    KC_K,    KC_X,   _______,  KC_B,    KC_M,    KC_W,    KC_V,    KC_Z,    KC_ENT ,
+  ADJUST,  KC_LCTL, KC_LALT, KC_LGUI, LOWER,   KC_SPC, _______,  KC_SPC,  RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT
+),
+
+[_LOWER] = LAYOUT_all(
+  KC_TILD, KC_EXLM, KC_AT,   KC_HASH, KC_DLR,  KC_PERC,          KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_DEL,
+  KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   _______, KC_F6,   KC_UNDS, KC_PLUS, KC_LCBR, KC_RCBR, KC_PIPE,
+  _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  _______, KC_F12,S(KC_NUHS),S(KC_NUBS),_______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY
+),
+
+[_RAISE] = LAYOUT_all(
+  KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,             KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_DEL,
+  KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   _______, KC_F6,   KC_MINS, KC_EQL,  KC_LBRC, KC_RBRC, KC_BSLS,
+  _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  _______, KC_F12,  KC_NUHS, KC_NUBS, _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY
+),
+
+[_ADJUST] =  LAYOUT_all(
+  _______, RESET,   _______, _______, _______, _______,          _______, _______, _______, _______, _______, KC_DEL,
+  _______, _______, _______, AU_ON,   AU_OFF,  AG_NORM, _______, AG_SWAP, QWERTY,  COLEMAK, DVORAK,  _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
+)
+};
+
+layer_state_t layer_state_set_user(layer_state_t state) {
+    return update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
+}
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+    switch (keycode) {
+        case QWERTY:
+            if (record->event.pressed) {
+                set_single_persistent_default_layer(_QWERTY);
+             }
+             break;
+        case COLEMAK:
+            if (record->event.pressed) {
+                set_single_persistent_default_layer(_COLEMAK);
+            }
+            break;
+        case DVORAK:
+            if (record->event.pressed) {
+                set_single_persistent_default_layer(_DVORAK);
+            }
+            break;
+    }
+    return true;
+}
+
+void encoder_update_user(uint8_t index, bool clockwise) {
+    if (clockwise) {
+      tap_code16(S(KC_VOLD));
+    } else {
+      tap_code16(KC_VOLU);
+    }
+}
diff --git a/keyboards/montsinger/rebound/rev3/keymaps/rossman360/keymap.c b/keyboards/montsinger/rebound/rev3/keymaps/rossman360/keymap.c
new file mode 100644
index 0000000000..ee15a60623
--- /dev/null
+++ b/keyboards/montsinger/rebound/rev3/keymaps/rossman360/keymap.c
@@ -0,0 +1,112 @@
+#include QMK_KEYBOARD_H
+#include "rossman360.h"
+
+#define PGMOD LT(_NUM, KC_PGDN)
+#define TABMOD LT(_FN1, KC_TAB)
+#define SPCMOD LT(_FN1, KC_SPACE)
+#define ENTMOD LT(_FN2, KC_ENTER)
+#define ESCMOD LT(_NUM, KC_ESC)
+#define RSMOD LT(_FN1, KC_RSHIFT)
+
+enum layer_names {
+  _BASE,
+  _DEL,
+  _FN1,
+  _FN2,
+  _NUM,
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+[_BASE] = LAYOUT_all(
+    KC_ESC  , KC_Q   , KC_W   , KC_E   , KC_R   , KC_T   ,          KC_Y   , KC_U   , KC_I   , KC_O   , KC_P   , NTAB  ,
+    JUMPBACK, KC_A   , KC_S   , KC_D   , KC_F   , KC_G   ,MO(_DEL), KC_H   , KC_J   , KC_K   , KC_L   , KC_SCLN, KC_QUOT,
+    KC_LSFT , KC_Z   , KC_X   , KC_C   , KC_V   , KC_B   , LM(_FN1, MOD_LALT), KC_N   , KC_M   , KC_COMM, KC_DOT , KC_SLSH, KC_MINS,
+    CMDBSP  , ALTDEL , KC_NO  , CTRLSP , KC_TAB , PGMOD  , QUIT   , ENTMOD , SPCMOD , MO(_DEL),KC_NO  , KC_BSPC, KC_DEL
+  ),
+
+[_FN1] = LAYOUT_all(
+    _______, TAB1   , TAB2   , TAB3   , TAB4   , _______,          _______, UNDO   , _______, _______, _______, CTAB   ,
+    KC_CAPS, _______, _______, _______, _______, _______, _______, KC_HOME, KC_LEFT, KC_UP  , KC_RIGHT,KC_END , KC_NO  ,
+    _______, _______, XPANDR , _______, _______, _______, _______, _______, PMERGE , KC_DOWN, _______, _______, EMDASH ,
+    WREFRESH,_______, _______, _______, LWORD  , RWORD  , _______, KC_NO  , _______, KC_NO  , _______, _______, _______
+  ),
+
+[_FN2] = LAYOUT_all(
+    _______, SPEAK1 , SPEAK2 , SPEAK3 , SPEAK4 , _______,          _______, _______, _______, _______, _______, _______,
+    _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+    _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+    _______, _______, _______, _______, PARADOWN, CSPEAK, _______, _______, KC_NO  , KC_NO  , _______, _______, _______
+  ),
+
+[_DEL] = LAYOUT_all(
+    RESET,   _______, _______, _______, _______, _______,          _______, UNDO   , _______, _______, _______, CTAB   ,
+    REMCAPS, _______, _______, _______, _______, _______, _______, _______, KC_LEFT, KC_UP  ,KC_RIGHT, _______, _______,
+    _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_DOWN, _______, _______, _______,
+    _______, _______, _______, KC_DEL , KC_BSPC, BWORD  , _______, KC_NO  , KC_NO  , _______, _______, _______, _______
+  ),
+
+[_NUM] = LAYOUT_all(
+    KC_GRV , KC_1   , KC_2   , KC_3   , KC_4   , KC_5   ,          KC_6   , KC_7   , KC_8   , KC_9   , KC_MINS, KC_EQL,
+    KC_CAPS, _______, _______, _______, _______, _______, _______, KC_MINS, KC_4   , KC_5   , KC_6   , KC_COLN, _______,
+    _______, _______, _______, _______, _______, KC_LBRC, _______, KC_RBRC, KC_1   , KC_2   , KC_3   , KC_BSLS, _______,
+    _______, _______, _______, _______, _______, _______, _______, KC_NO  , KC_NO  , KC_0   , _______, _______, _______
+  )
+};
+
+void encoder_update_user(uint8_t index, bool clockwise) {
+   switch(get_highest_layer(layer_state)){
+case _BASE:
+    if (clockwise) {
+      tap_code16(KC_VOLD);
+    } else {
+      tap_code16(KC_VOLU);
+    }
+   break;
+ case _FN1:
+    if (clockwise) {
+      tap_code16(S(KC_TAB));
+    } else {
+      tap_code16(KC_TAB);
+    }
+   break;
+}
+}
+
+#ifdef OLED_DRIVER_ENABLE
+void oled_task_user(void) {
+    // Host Keyboard Layer Status
+    oled_write_P(PSTR(""), false);
+
+    switch (get_highest_layer(layer_state)) {
+        case _BASE:
+            oled_write_P(PSTR("Rebound\n"), false);
+            oled_write_P(PSTR("Rev3.1\n"), false);
+	    break;
+        case _FN1:
+            oled_write_P(PSTR("Fn\n"), false);
+            break;
+        case _FN2:
+            oled_write_P(PSTR("Para\n"), false);
+            break;
+            case _NUM:
+            oled_write_P(PSTR("Num\n"), false);
+            break;
+            case _DEL:
+            oled_write_P(PSTR("Del\n"), false);
+            break;
+        default:
+            // Or use the write_ln shortcut over adding '\n' to the end of your string
+            oled_write_ln_P(PSTR("Undefined"), false);
+}
+
+    // Host Keyboard LED Status
+    led_t led_state = host_keyboard_led_state();
+    oled_write_P(led_state.num_lock ? PSTR("NUM ") : PSTR("    "), false);
+    oled_write_P(led_state.caps_lock ? PSTR("CAPS") : PSTR("    "), false);
+    oled_write_P(led_state.scroll_lock ? PSTR("SCR ") : PSTR("    "), false);
+
+}
+
+#endif
+
diff --git a/keyboards/montsinger/rebound/rev3/keymaps/rossman360/rules.mk b/keyboards/montsinger/rebound/rev3/keymaps/rossman360/rules.mk
new file mode 100644
index 0000000000..ca475d2e17
--- /dev/null
+++ b/keyboards/montsinger/rebound/rev3/keymaps/rossman360/rules.mk
@@ -0,0 +1,4 @@
+MOUSEKEY_ENABLE = no       # Mouse keys
+CONSOLE_ENABLE = no       # Console for debug
+COMMAND_ENABLE = no        # Commands for debug and configuration
+OLED_DRIVER_ENABLE = no
diff --git a/keyboards/montsinger/rebound/rev3/rev3.h b/keyboards/montsinger/rebound/rev3/rev3.h
new file mode 100644
index 0000000000..b709a4cea0
--- /dev/null
+++ b/keyboards/montsinger/rebound/rev3/rev3.h
@@ -0,0 +1,53 @@
+/* Copyright 2020 Ross Montsinger
+ *
+ * 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"
+
+/* This is a shortcut to help you visually see your layout.
+ * The first section contains all of the arguments representing the
+ * layout of the board and position of the keys.
+ *
+ * The second converts the arguments into a two-dimensional array which
+ * represents the switch matrix.
+ */
+
+#define LAYOUT_ortho_4x12( \
+    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, \
+    K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, \
+    K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B,\
+    K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B\
+    ) { \
+  { K00,   K01,   K02,   K03,   K04,   K05,   K06,   K07,   K08,   K09,   K0A,   K0B   }, \
+  { K10,   K11,   K12,   K13,   K14,   K15,   K16,   K17,   K18,   K19,   K1A,   K1B   }, \
+  { K20,   K21,   K22,   K23,   K24,   K25,   K26,   K27,   K28,   K29,   K2A,   K2B   }, \
+  { K30,   K31,   K32,   K33,   K34,   K35,   K36,   K37,   K38,   K39,   K3A,   K3B   }, \
+  { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }  \
+}
+
+#define LAYOUT_all( \
+    K00, K01, K02, K03, K04, K05,      K06, K07, K08, K09, K0A, K0B, \
+    K10, K11, K12, K13, K14, K15, K42, K16, K17, K18, K19, K1A, K1B, \
+    K20, K21, K22, K23, K24, K25, K43, K26, K27, K28, K29, K2A, K2B,\
+    K30, K31, K32, K33, K34, K35, K44, K36, K37, K38, K39, K3A, K3B\
+    ) { \
+  { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B }, \
+  { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B }, \
+  { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B }, \
+  { K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B }, \
+  { KC_NO, KC_NO, K42, K43, K44, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO } \
+}
diff --git a/keyboards/montsinger/rebound/rev3/rules.mk b/keyboards/montsinger/rebound/rev3/rules.mk
new file mode 100644
index 0000000000..61e36fc449
--- /dev/null
+++ b/keyboards/montsinger/rebound/rev3/rules.mk
@@ -0,0 +1,34 @@
+# 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 = yes        # Console for debug
+COMMAND_ENABLE = yes        # 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 = no            # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+MIDI_ENABLE = no            # MIDI support
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+AUDIO_ENABLE = no           # Audio output on port C6
+FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
+HD44780_ENABLE = no         # Enable support for HD44780 based LCDs
+ENCODER_ENABLE = yes
+
+LAYOUTS = ortho_4x12
+LAYOUTS_HAS_RGB = no
+