diff --git a/v3/keebio/sinc/sinc-rev4.json b/v3/keebio/sinc/sinc-rev4.json
new file mode 100644
index 0000000000..bacd7399fe
--- /dev/null
+++ b/v3/keebio/sinc/sinc-rev4.json
@@ -0,0 +1,228 @@
+{
+  "name": "Sinc Rev. 4", 
+  "vendorId": "0xCB10", 
+  "productId": "0x4267", 
+  "keycodes": ["qmk_lighting"], 
+  "menus": ["qmk_rgb_matrix"], 
+  "matrix": {"rows": 12, "cols": 9}, 
+  "layouts": {
+    "labels": [
+      "Left Macropad", 
+      ["Left Encoder", "Encoder", "Switch", "No Switch"], 
+      "Split Left Shift", 
+      ["Left Space", "1.25-2.25", "2.25-1.25", "1.25-1-1.25"], 
+      "Right Encoder", 
+      "Split Backspace", 
+      "ISO Enter", 
+      "Split Right Shift", 
+      ["Right Space", "2.75", "1.25-1.5"], 
+      ["Right Mods", "6x1u", "2x1.25u__3x1u"]
+    ], 
+    "keymap": [
+      [
+        {"d": true}, 
+        "5,0\n\n\n1,2", 
+        {"c": "#aaaaaa"}, 
+        "5,0\n\n\n1,1", 
+        {"x": 0.25}, 
+        "5,0\n\n\n1,0\n\n\n\n\n\ne0", 
+        {"x": 1.5, "c": "#777777"}, 
+        "5,2", 
+        {"x": 0.25, "c": "#cccccc"}, 
+        "5,3", 
+        "5,4", 
+        "5,5", 
+        "5,6", 
+        {"x": 0.25, "c": "#aaaaaa"}, 
+        "5,7", 
+        "5,8", 
+        {"x": 1}, 
+        "11,1", 
+        "11,2", 
+        {"x": 0.25, "c": "#cccccc"}, 
+        "11,3", 
+        "11,4", 
+        "11,5", 
+        "11,6", 
+        {"x": 0.25}, 
+        "11,7", 
+        "11,8\n\n\n4,0\n\n\n\n\n\ne1", 
+        {"x": 0.75}, 
+        "11,8\n\n\n4,1"
+      ], 
+      [
+        {"y": 0.25, "d": true}, 
+        "0,0\n\n\n0,1", 
+        {"d": true}, 
+        "0,1\n\n\n0,1", 
+        {"x": 0.25, "c": "#aaaaaa"}, 
+        "0,0\n\n\n0,0", 
+        "0,1\n\n\n0,0", 
+        {"x": 0.5}, 
+        "0,2", 
+        {"c": "#cccccc"}, 
+        "0,3", 
+        "0,4", 
+        "0,5", 
+        "0,6", 
+        "0,7", 
+        "0,8", 
+        {"x": 1}, 
+        "6,0", 
+        "6,1", 
+        "6,2", 
+        "6,3", 
+        "6,4", 
+        "6,5", 
+        {"c": "#aaaaaa"}, 
+        "6,6\n\n\n5,0", 
+        "6,7\n\n\n5,0", 
+        "6,8", 
+        {"x": 0.75, "w": 2}, 
+        "6,7\n\n\n5,1"
+      ], 
+      [
+        {"c": "#cccccc", "d": true}, 
+        "1,0\n\n\n0,1", 
+        {"d": true}, 
+        "1,1\n\n\n0,1", 
+        {"x": 0.25, "c": "#aaaaaa"}, 
+        "1,0\n\n\n0,0", 
+        "1,1\n\n\n0,0", 
+        {"x": 0.5, "w": 1.5}, 
+        "1,2", 
+        {"c": "#cccccc"}, 
+        "1,3", 
+        "1,4", 
+        "1,5", 
+        "1,6", 
+        "1,7", 
+        {"x": 1}, 
+        "7,0", 
+        "7,1", 
+        "7,2", 
+        "7,3", 
+        "7,4", 
+        "7,5", 
+        "7,6", 
+        {"w": 1.5}, 
+        "7,7\n\n\n6,0", 
+        {"c": "#aaaaaa"}, 
+        "7,8", 
+        {"x": 1.5, "w": 1.25, "h": 2, "w2": 1.5, "h2": 1, "x2": -0.25}, 
+        "7,7\n\n\n6,1"
+      ], 
+      [
+        {"c": "#cccccc", "d": true}, 
+        "2,0\n\n\n0,1", 
+        {"d": true}, 
+        "2,1\n\n\n0,1", 
+        {"x": 0.25, "c": "#aaaaaa"}, 
+        "2,0\n\n\n0,0", 
+        "2,1\n\n\n0,0", 
+        {"x": 0.5, "w": 1.75}, 
+        "2,2", 
+        {"c": "#cccccc"}, 
+        "2,3", 
+        "2,4", 
+        "2,5", 
+        "2,6", 
+        "2,7", 
+        {"x": 1}, 
+        "8,0", 
+        "8,1", 
+        "8,2", 
+        "8,3", 
+        "8,4", 
+        "8,5", 
+        {"c": "#777777", "w": 2.25}, 
+        "8,7\n\n\n6,0", 
+        {"c": "#aaaaaa"}, 
+        "8,8", 
+        {"x": 0.5, "c": "#cccccc"}, 
+        "8,6\n\n\n6,1"
+      ], 
+      [
+        {"d": true}, 
+        "3,0\n\n\n0,1", 
+        {"d": true}, 
+        "3,1\n\n\n0,1", 
+        {"x": 0.25, "c": "#aaaaaa"}, 
+        "3,0\n\n\n0,0", 
+        "3,1\n\n\n0,0", 
+        {"x": 0.5, "w": 2.25}, 
+        "3,2\n\n\n2,0", 
+        {"c": "#cccccc"}, 
+        "3,4", 
+        "3,5", 
+        "3,6", 
+        "3,7", 
+        "3,8", 
+        {"x": 1}, 
+        "9,0", 
+        "9,1", 
+        "9,2", 
+        "9,3", 
+        "9,4", 
+        {"c": "#aaaaaa", "w": 1.75}, 
+        "9,6\n\n\n7,0", 
+        "9,7\n\n\n7,0", 
+        "9,8", 
+        {"x": 0.5, "w": 2.75}, 
+        "9,6\n\n\n7,1"
+      ], 
+      [
+        {"c": "#cccccc", "d": true}, 
+        "4,0\n\n\n0,1", 
+        {"d": true}, 
+        "4,1\n\n\n0,1", 
+        {"x": 0.25, "c": "#aaaaaa"}, 
+        "4,0\n\n\n0,0", 
+        "4,1\n\n\n0,0", 
+        {"x": 0.5, "w": 1.25}, 
+        "4,2", 
+        {"w": 1.25}, 
+        "4,3", 
+        {"w": 1.25}, 
+        "4,4", 
+        {"w": 1.25}, 
+        "4,5\n\n\n3,0", 
+        {"c": "#cccccc", "w": 2.25}, 
+        "4,7\n\n\n3,0", 
+        {"x": 1, "w": 2.75}, 
+        "10,1\n\n\n8,0", 
+        {"c": "#aaaaaa"}, 
+        "10,2\n\n\n9,0", 
+        "10,3\n\n\n9,0", 
+        "10,4\n\n\n9,0", 
+        "10,6", 
+        "10,7", 
+        "10,8"
+      ], 
+      [
+        {"x": 4.75, "w": 1.25}, 
+        "3,2\n\n\n2,1", 
+        "3,3\n\n\n2,1", 
+        {"x": 1.5, "c": "#cccccc", "w": 2.25}, 
+        "4,5\n\n\n3,1", 
+        {"c": "#aaaaaa", "w": 1.25}, 
+        "4,7\n\n\n3,1", 
+        {"x": 1, "c": "#cccccc", "w": 1.25}, 
+        "10,0\n\n\n8,1", 
+        {"w": 1.5}, 
+        "10,1\n\n\n8,1", 
+        {"c": "#aaaaaa", "w": 1.25}, 
+        "10,2\n\n\n9,1", 
+        {"w": 1.25}, 
+        "10,3\n\n\n9,1"
+      ], 
+      [
+        {"x": 8.5, "c": "#cccccc", "w": 1.25}, 
+        "4,5\n\n\n3,2", 
+        "4,6\n\n\n3,2", 
+        {"c": "#aaaaaa", "w": 1.25}, 
+        "4,7\n\n\n3,2"
+      ]
+    ]
+  }
+}