diff --git a/keyboards/montsinger/rebound/rev4/config.h b/keyboards/montsinger/rebound/rev4/config.h
index 9932cd2d67..be97ab98d7 100644
--- a/keyboards/montsinger/rebound/rev4/config.h
+++ b/keyboards/montsinger/rebound/rev4/config.h
@@ -23,7 +23,6 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#define DEVICE_VER 0x0002
#define MANUFACTURER Montsinger
#define PRODUCT Rebound
-#define DESCRIPTION "A conjoined Let's Split"
/* key matrix size */
diff --git a/keyboards/montsinger/rebound/rev4/keymaps/via/keymap.c b/keyboards/montsinger/rebound/rev4/keymaps/via/keymap.c
new file mode 100644
index 0000000000..325036231d
--- /dev/null
+++ b/keyboards/montsinger/rebound/rev4/keymaps/via/keymap.c
@@ -0,0 +1,118 @@
+/* Copyright 2021 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/>.
+ */
+
+#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/rev4/keymaps/via/rules.mk b/keyboards/montsinger/rebound/rev4/keymaps/via/rules.mk
new file mode 100644
index 0000000000..36b7ba9cbc
--- /dev/null
+++ b/keyboards/montsinger/rebound/rev4/keymaps/via/rules.mk
@@ -0,0 +1,2 @@
+VIA_ENABLE = yes
+LTO_ENABLE = yes