diff --git a/keyboards/marksard/leftover30/config.h b/keyboards/marksard/leftover30/config.h
new file mode 100644
index 0000000000..42c6c62872
--- /dev/null
+++ b/keyboards/marksard/leftover30/config.h
@@ -0,0 +1,138 @@
+/*
+Copyright 2020 marksard
+
+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 0xDFA8
+#define DEVICE_VER 0x0001
+#define MANUFACTURER marksard
+#define PRODUCT leftover30
+
+/* Encoder */
+#define ENCODERS_PAD_A { F4 }
+#define ENCODERS_PAD_B { F5 }
+// #define ENCODER_DIRECTION_FLIP
+
+/* key matrix size */
+#define MATRIX_ROWS 8
+#define MATRIX_COLS 5
+
+/*
+ * 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 { B6, B2, F7, F6, B3, B1, D4, D0 }
+#define MATRIX_COL_PINS { B5, B4, E6, D7, C6 }
+#define UNUSED_PINS
+
+/* COL2ROW, ROW2COL*/
+#define DIODE_DIRECTION COL2ROW
+
+#define RGB_DI_PIN D3
+#ifdef RGB_DI_PIN
+ #define RGBLED_NUM 6
+ #define RGBLIGHT_HUE_STEP 8
+ #define RGBLIGHT_SAT_STEP 8
+ #define RGBLIGHT_VAL_STEP 8
+ #define RGBLIGHT_LIMIT_VAL 255 /* The maximum brightness level */
+ #define RGBLIGHT_SLEEP /* If defined, the RGB lighting will be switched off when the host goes to sleep */
+/*== all animations enable ==*/
+ #define RGBLIGHT_ANIMATIONS
+/*== or choose animations ==*/
+// #define RGBLIGHT_EFFECT_BREATHING
+// #define RGBLIGHT_EFFECT_RAINBOW_MOOD
+// #define RGBLIGHT_EFFECT_RAINBOW_SWIRL
+// #define RGBLIGHT_EFFECT_SNAKE
+// #define RGBLIGHT_EFFECT_KNIGHT
+// #define RGBLIGHT_EFFECT_CHRISTMAS
+// #define RGBLIGHT_EFFECT_STATIC_GRADIENT
+// #define RGBLIGHT_EFFECT_RGB_TEST
+// #define RGBLIGHT_EFFECT_ALTERNATING
+/*== customize breathing effect ==*/
+ /*==== (DEFAULT) use fixed table instead of exp() and sin() ====*/
+ #define RGBLIGHT_BREATHE_TABLE_SIZE 256 // 256(default) or 128 or 64
+ /*==== use exp() and sin() ====*/
+ #define RGBLIGHT_EFFECT_BREATHE_CENTER 1.85 // 1 to 2.7
+ #define RGBLIGHT_EFFECT_BREATHE_MAX 255 // 0 to 255
+#endif
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCE 5
+
+/* define if matrix has ghost (lacks anti-ghosting diodes) */
+//#define MATRIX_HAS_GHOST
+
+/* 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
+
+/* If defined, GRAVE_ESC will always act as ESC when CTRL is held.
+ * This is userful for the Windows task manager shortcut (ctrl+shift+esc).
+ */
+// #define GRAVE_ESC_CTRL_OVERRIDE
+
+/*
+ * Force NKRO
+ *
+ * Force NKRO (nKey Rollover) to be enabled by default, regardless of the saved
+ * state in the bootmagic EEPROM settings. (Note that NKRO must be enabled in the
+ * makefile for this to work.)
+ *
+ * If forced on, NKRO can be disabled via magic key (default = LShift+RShift+N)
+ * until the next keyboard reset.
+ *
+ * NKRO may prevent your keystrokes from being detected in the BIOS, but it is
+ * fully operational during normal computer usage.
+ *
+ * For a less heavy-handed approach, enable NKRO via magic key (LShift+RShift+N)
+ * or via bootmagic (hold SPACE+N while plugging in the keyboard). Once set by
+ * bootmagic, NKRO mode will always be enabled until it is toggled again during a
+ * power-up.
+ *
+ */
+//#define FORCE_NKRO
+
+/*
+ * Feature disable options
+ * These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+//#define NO_DEBUG
+
+/* disable print */
+//#define NO_PRINT
+
+/* disable action features */
+//#define NO_ACTION_LAYER
+//#define NO_ACTION_TAPPING
+//#define NO_ACTION_ONESHOT
+
+/* disable these deprecated features by default */
+#define NO_ACTION_MACRO
+#define NO_ACTION_FUNCTION
diff --git a/keyboards/marksard/leftover30/info.json b/keyboards/marksard/leftover30/info.json
new file mode 100644
index 0000000000..700d08d9d3
--- /dev/null
+++ b/keyboards/marksard/leftover30/info.json
@@ -0,0 +1,198 @@
+{
+ "keyboard_name": "Leftover30",
+ "url": "https://github.com/marksard/Keyboards",
+ "maintainer": "marksard",
+ "width": 11.5,
+ "height": 4,
+ "layouts": {
+ "LAYOUT": {
+ "layout": [
+ {
+ "label": "Q",
+ "x": 0.5,
+ "y": 0
+ },
+ {
+ "label": "W",
+ "x": 1.5,
+ "y": 0
+ },
+ {
+ "label": "E",
+ "x": 2.5,
+ "y": 0
+ },
+ {
+ "label": "R",
+ "x": 3.5,
+ "y": 0
+ },
+ {
+ "label": "T",
+ "x": 4.5,
+ "y": 0
+ },
+ {
+ "label": "Y",
+ "x": 5.5,
+ "y": 0
+ },
+ {
+ "label": "U",
+ "x": 6.5,
+ "y": 0
+ },
+ {
+ "label": "I",
+ "x": 7.5,
+ "y": 0
+ },
+ {
+ "label": "O",
+ "x": 8.5,
+ "y": 0
+ },
+ {
+ "label": "P",
+ "x": 9.5,
+ "y": 0
+ },
+ {
+ "label": "BS",
+ "x": 10.5,
+ "y": 0
+ },
+ {
+ "label": "A",
+ "x": 0.75,
+ "y": 1
+ },
+ {
+ "label": "S",
+ "x": 1.75,
+ "y": 1
+ },
+ {
+ "label": "D",
+ "x": 2.75,
+ "y": 1
+ },
+ {
+ "label": "F",
+ "x": 3.75,
+ "y": 1
+ },
+ {
+ "label": "G",
+ "x": 4.75,
+ "y": 1
+ },
+ {
+ "label": "H",
+ "x": 5.75,
+ "y": 1
+ },
+ {
+ "label": "J",
+ "x": 6.75,
+ "y": 1
+ },
+ {
+ "label": "K",
+ "x": 7.75,
+ "y": 1
+ },
+ {
+ "label": "L",
+ "x": 8.75,
+ "y": 1
+ },
+ {
+ "label": "Enter",
+ "x": 9.75,
+ "y": 1,
+ "w": 1.75
+ },
+ {
+ "label": "Z",
+ "x": 1.25,
+ "y": 2
+ },
+ {
+ "label": "X",
+ "x": 2.25,
+ "y": 2
+ },
+ {
+ "label": "C",
+ "x": 3.25,
+ "y": 2
+ },
+ {
+ "label": "V",
+ "x": 4.25,
+ "y": 2
+ },
+ {
+ "label": "B",
+ "x": 5.25,
+ "y": 2
+ },
+ {
+ "label": "N",
+ "x": 6.25,
+ "y": 2
+ },
+ {
+ "label": "M",
+ "x": 7.25,
+ "y": 2
+ },
+ {
+ "label": "<",
+ "x": 8.25,
+ "y": 2
+ },
+ {
+ "label": ">",
+ "x": 9.25,
+ "y": 2
+ },
+ {
+ "label": "?",
+ "x": 10.25,
+ "y": 2,
+ "w": 1.25
+ },
+ {
+ "label": "",
+ "x": 0,
+ "y": 3
+ },
+ {
+ "label": "Alt",
+ "x": 1.5,
+ "y": 3,
+ "w": 1.25
+ },
+ {
+ "label": "",
+ "x": 2.75,
+ "y": 3,
+ "w": 6.25
+ },
+ {
+ "label": "Fn1",
+ "x": 9,
+ "y": 3
+ },
+ {
+ "label": "Ctrl",
+ "x": 10,
+ "y": 3,
+ "w": 1.5
+ }
+ ]
+ }
+ }
+}
diff --git a/keyboards/marksard/leftover30/keymaps/default/config.h b/keyboards/marksard/leftover30/keymaps/default/config.h
new file mode 100644
index 0000000000..8bffbbb3b5
--- /dev/null
+++ b/keyboards/marksard/leftover30/keymaps/default/config.h
@@ -0,0 +1,24 @@
+/* Copyright 2020 marksard
+ *
+ * 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
+
+// place overrides here
+#define TAPPING_TERM 200
+#define IGNORE_MOD_TAP_INTERRUPT
+
+#define TAPPING_LAYER_TERM 150 // Custom LT Tapping term
+#define TAPPING_TERM_PER_KEY
diff --git a/keyboards/marksard/leftover30/keymaps/default/keymap.c b/keyboards/marksard/leftover30/keymaps/default/keymap.c
new file mode 100644
index 0000000000..60751cd1ca
--- /dev/null
+++ b/keyboards/marksard/leftover30/keymaps/default/keymap.c
@@ -0,0 +1,162 @@
+/* Copyright 2020 marksard
+ *
+ * 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 layer_number {
+ _BASE,
+ _LOWER,
+ _RAISE,
+ _ADJUST,
+};
+
+enum custom_keycodes {
+ RGBRST = SAFE_RANGE,
+ LOWER,
+ RAISE,
+ KANJI,
+};
+
+// #define KC_ESAD LT(_ADJUST, KC_ESC)
+// #define KC_BSLO LT(_LOWER, KC_BSPC)
+#define KC_LOWR MO(_LOWER)
+#define KC_SPRA LT(_RAISE, KC_SPC)
+#define KC_AJST MO(_ADJUST)
+
+#define KC_Q_AL LALT_T(KC_Q)
+#define KC_A_CT LCTL_T(KC_A)
+#define KC_Z_SF LSFT_T(KC_Z)
+#define KC_X_AL LALT_T(KC_X)
+#define KC_ENSF RSFT_T(KC_ENT)
+#define KC_SLSF RSFT_T(KC_SLSH)
+
+#define KC_F1AL LALT_T(KC_F1)
+#define KC_F6CT LCTL_T(KC_F6)
+#define KC_11SF LSFT_T(KC_F11)
+#define KC_12AL LALT_T(KC_F12)
+#define KC_QUSF RCTL_T(KC_QUOT)
+#define KC_ROSF RSFT_T(KC_RO)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+ [_BASE] = LAYOUT_all(
+ //,-----------------------------------------------------------------------------------------------------------.
+ KC_Q_AL, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_BSPC,
+ //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+ KC_A_CT, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_ENSF,
+ //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+ KC_Z_SF, KC_X_AL, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSF,
+ //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+ KC_LCTL, KC_LGUI, KC_SPRA, KC_LOWR, KC_RCTL
+ //`-----------------------------------------------------------------------------------------------------------'
+ ),
+
+ [_LOWER] = LAYOUT_all(
+ //,-----------------------------------------------------------------------------------------------------------.
+ KC_F1AL, KC_F2, KC_F3, KC_F4, KC_F5, KC_MINS, KC_EQL, KC_JYEN, KC_LBRC, KC_RBRC, KC_BSLS,
+ //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+ KC_F6CT, KC_F7, KC_F8, KC_F9, KC_F10, XXXXXXX, XXXXXXX, XXXXXXX, KC_SCLN, KC_QUSF,
+ //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+ KC_11SF, KC_12AL, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, KC_GRV, KC_RO, KC_SLSH, KC_ROSF,
+ //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+ _______, _______, KC_AJST, _______, _______
+ //`-----------------------------------------------------------------------------------------------------------'
+ ),
+
+ [_RAISE] = LAYOUT_all(
+ //,-----------------------------------------------------------------------------------------------------------.
+ KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS,
+ //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+ KC_LCTL, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, KC_LEFT, KC_DOWN, KC_UP, KC_RGHT, _______,
+ //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+ KC_LSFT, XXXXXXX, KC_ESC, KC_TAB, KANJI, KC_DEL, KC_COMM, KC_DOT, KC_BSLS, KC_ROSF,
+ //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+ _______, _______, _______, KC_AJST, _______
+ //`-----------------------------------------------------------------------------------------------------------'
+ ),
+
+ [_ADJUST] = LAYOUT_all(
+ //,-----------------------------------------------------------------------------------------------------------.
+ RESET, RGBRST, AG_NORM, AG_SWAP, XXXXXXX, KC_HOME, KC_PGDN, KC_PGUP, KC_END, KC_INS, KC_PSCR,
+ //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+ RGB_TOG, RGB_HUI, RGB_SAI, RGB_VAI, XXXXXXX, KC_MS_L, KC_MS_D, KC_MS_U, KC_MS_R, KC_NLCK,
+ //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+ RGB_MOD, RGB_HUD, RGB_SAD, RGB_VAD, XXXXXXX, KC_BTN1, KC_BTN2, XXXXXXX, XXXXXXX, KC_CAPS,
+ //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+ _______, _______, _______, _______, KC_CAPS
+ //`-----------------------------------------------------------------------------------------------------------'
+ )
+};
+
+uint16_t get_tapping_term(uint16_t keycode) {
+ switch (keycode) {
+ case KC_SPRA:
+ return TAPPING_LAYER_TERM;
+ default:
+ return TAPPING_TERM;
+ }
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+
+ bool result = false;
+ switch (keycode) {
+ case KANJI:
+ if (record->event.pressed) {
+ register_code16(keymap_config.swap_lalt_lgui ? A(KC_GRV) : KC_LANG2);
+ } else {
+ unregister_code16(keymap_config.swap_lalt_lgui ? A(KC_GRV) : KC_LANG2);
+ }
+ break;
+#ifdef RGBLIGHT_ENABLE
+ case RGBRST:
+ if (record->event.pressed) {
+ eeconfig_update_rgblight_default();
+ rgblight_enable();
+ }
+ break;
+#endif
+ default:
+ result = true;
+ break;
+ }
+
+ return result;
+}
+
+void encoder_update_user(uint8_t index, bool clockwise) {
+ if (index == 0) {
+ if (IS_LAYER_ON(_ADJUST)) {
+ if (clockwise) {
+ rgblight_increase_hue_noeeprom();
+ } else {
+ rgblight_decrease_hue_noeeprom();
+ }
+ } else if (IS_LAYER_ON(_LOWER)) {
+ tap_code16((clockwise == true) ? LCTL(KC_Y) : LCTL(KC_Z));
+ } else if (IS_LAYER_ON(_RAISE)) {
+ tap_code16((clockwise == true) ? S(KC_DOWN) : S(KC_UP));
+ } else {
+ tap_code((clockwise == true) ? KC_WH_D : KC_WH_U);
+ }
+
+ }
+}
+
+// for exsample customize of LED inducator
+// bool led_update_user(led_t led_state) {
+// writePin(D2, IS_LAYER_ON(_LOWER));
+// writePin(D1, IS_LAYER_ON(_RAISE));
+// return false;
+// }
diff --git a/keyboards/marksard/leftover30/keymaps/default/readme.md b/keyboards/marksard/leftover30/keymaps/default/readme.md
new file mode 100644
index 0000000000..05dcdc3d14
--- /dev/null
+++ b/keyboards/marksard/leftover30/keymaps/default/readme.md
@@ -0,0 +1 @@
+# The default keymap for leftover30
diff --git a/keyboards/marksard/leftover30/keymaps/default/rules.mk b/keyboards/marksard/leftover30/keymaps/default/rules.mk
new file mode 100644
index 0000000000..5af1ba8536
--- /dev/null
+++ b/keyboards/marksard/leftover30/keymaps/default/rules.mk
@@ -0,0 +1 @@
+ENCODER_ENABLE = yes
diff --git a/keyboards/marksard/leftover30/leftover30.c b/keyboards/marksard/leftover30/leftover30.c
new file mode 100644
index 0000000000..df8152144b
--- /dev/null
+++ b/keyboards/marksard/leftover30/leftover30.c
@@ -0,0 +1,37 @@
+/* Copyright 2020 marksard
+ *
+ * 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 "leftover30.h"
+
+// Optional override functions below.
+// You can leave any or all of these undefined.
+// These are only required if you want to perform custom actions.
+
+void keyboard_pre_init_user(void) {
+ /* Set CAPSLOCK indicator pin as output */
+ setPinOutput(D1);
+ /* Set NUMLOCK indicator pin as output */
+ setPinOutput(D2);
+}
+
+bool led_update_kb(led_t led_state) {
+ bool res = led_update_user(led_state);
+ if(res) {
+ writePin(D2, led_state.num_lock);
+ writePin(D1, led_state.caps_lock);
+ }
+ return res;
+}
diff --git a/keyboards/marksard/leftover30/leftover30.h b/keyboards/marksard/leftover30/leftover30.h
new file mode 100644
index 0000000000..901b9b570a
--- /dev/null
+++ b/keyboards/marksard/leftover30/leftover30.h
@@ -0,0 +1,45 @@
+/* Copyright 2020 marksard
+ *
+ * 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 physical
+ * 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_all( \
+ k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a,\
+ k10, k11, k12, k13, k14, k15, k16, k17, k18, k19,\
+ k20, k21, k22, k23, k24, k25, k26, k27, k28, k29,\
+ k30, k31, k32, k33, k34\
+) \
+{ \
+ { k09, k08, k07, k06, k05 }, \
+ { k19, k18, k17, k16, k15 }, \
+ { k29, k28, k27, k26, k25 }, \
+ { k0a, k34, k33, k32, k31 }, \
+\
+ { k04, k03, k02, k01, k00 }, \
+ { k14, k13, k12, k11, k10 }, \
+ { k24, k23, k22, k21, k20 }, \
+ { KC_NO, KC_NO, KC_NO, KC_NO, k30 } \
+}
diff --git a/keyboards/marksard/leftover30/readme.md b/keyboards/marksard/leftover30/readme.md
new file mode 100644
index 0000000000..6fefb057f2
--- /dev/null
+++ b/keyboards/marksard/leftover30/readme.md
@@ -0,0 +1,17 @@
+# leftover30
+
+
+
+A 30% mini keyboard.
+
+* Keyboard Maintainer: [marksard](https://github.com/marksard)
+* Hardware Supported: LEFTOVER30 PCB (with Pro Micro)
+* Hardware Availability: [Mark's Garage](https://marksard.booth.pm/)
+
+Make example for this keyboard (after setting up your build environment):
+
+ make marksard/leftover30:default
+
+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).
+
+[Build guide](https://github.com/marksard/Keyboards/blob/master/leftover30/documents/leftover30_buildguide.md)
diff --git a/keyboards/marksard/leftover30/rules.mk b/keyboards/marksard/leftover30/rules.mk
new file mode 100644
index 0000000000..dd52fe113e
--- /dev/null
+++ b/keyboards/marksard/leftover30/rules.mk
@@ -0,0 +1,22 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = caterina
+
+# Build Options
+# change yes to no to disable
+#
+BOOTMAGIC_ENABLE = no # 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 = no # USB Nkey Rollover
+BACKLIGHT_ENABLE = no # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = yes # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no # Enable Bluetooth
+AUDIO_ENABLE = no # Audio output