diff --git a/config/boards/shields/mlego_m66_rev4/mlego_m66_rev4.overlay b/config/boards/shields/mlego_m66_rev4/mlego_m66_rev4.overlay
index a1aa21d..dffc7b0 100644
--- a/config/boards/shields/mlego_m66_rev4/mlego_m66_rev4.overlay
+++ b/config/boards/shields/mlego_m66_rev4/mlego_m66_rev4.overlay
@@ -10,6 +10,81 @@
 
    //compatible = "nice-nano-v2";
 
+    m66_layout: m66_layout {
+        compatible = "zmk,physical-layout";
+        display-name = "m66 default layout";
+        d";
+
+        keys  //                     w   h    x    y     rot    rx    ry
+            = <&key_physical_attrs 100 100    0    0       0     0     0>
+            , <&key_physical_attrs 100 100  100    0       0     0     0>
+            , <&key_physical_attrs 100 100  200    0       0     0     0>
+            , <&key_physical_attrs 100 100  300    0       0     0     0>
+            , <&key_physical_attrs 100 100  400    0       0     0     0>
+            , <&key_physical_attrs 100 100  500    0       0     0     0>
+            , <&key_physical_attrs 100 100  600    0       0     0     0>
+            , <&key_physical_attrs 100 100  700    0       0     0     0>
+            , <&key_physical_attrs 100 100  800    0       0     0     0>
+            , <&key_physical_attrs 100 100  900    0       0     0     0>
+            , <&key_physical_attrs 100 100 1000    0       0     0     0>
+            , <&key_physical_attrs 100 100 1100    0       0     0     0>
+            , <&key_physical_attrs 100 100 1200    0       0     0     0>
+            , <&key_physical_attrs 100 100 1300    0       0     0     0>
+            , <&key_physical_attrs 100 100    0  100       0     0     0>
+            , <&key_physical_attrs 100 100  100  100       0     0     0>
+            , <&key_physical_attrs 100 100  200  100       0     0     0>
+            , <&key_physical_attrs 100 100  300  100       0     0     0>
+            , <&key_physical_attrs 100 100  400  100       0     0     0>
+            , <&key_physical_attrs 100 100  500  100       0     0     0>
+            , <&key_physical_attrs 100 100  600  100       0     0     0>
+            , <&key_physical_attrs 100 100  700  100       0     0     0>
+            , <&key_physical_attrs 100 100  800  100       0     0     0>
+            , <&key_physical_attrs 100 100  900  100       0     0     0>
+            , <&key_physical_attrs 100 100 1000  100       0     0     0>
+            , <&key_physical_attrs 100 100 1100  100       0     0     0>
+            , <&key_physical_attrs 100 100 1200  100       0     0     0>
+            , <&key_physical_attrs 100 100    0  200       0     0     0>
+            , <&key_physical_attrs 100 100  100  200       0     0     0>
+            , <&key_physical_attrs 100 100  200  200       0     0     0>
+            , <&key_physical_attrs 100 100  300  200       0     0     0>
+            , <&key_physical_attrs 100 100  400  200       0     0     0>
+            , <&key_physical_attrs 100 100  500  200       0     0     0>
+            , <&key_physical_attrs 100 100  600  200       0     0     0>
+            , <&key_physical_attrs 100 100  700  200       0     0     0>
+            , <&key_physical_attrs 100 100  800  200       0     0     0>
+            , <&key_physical_attrs 100 100  900  200       0     0     0>
+            , <&key_physical_attrs 100 100 1000  200       0     0     0>
+            , <&key_physical_attrs 100 100 1100  200       0     0     0>
+            , <&key_physical_attrs 100 100 1200  200       0     0     0>
+            , <&key_physical_attrs 100 100    0  300       0     0     0>
+            , <&key_physical_attrs 100 100  100  300       0     0     0>
+            , <&key_physical_attrs 100 100  200  300       0     0     0>
+            , <&key_physical_attrs 100 100  300  300       0     0     0>
+            , <&key_physical_attrs 100 100  400  300       0     0     0>
+            , <&key_physical_attrs 100 100  500  300       0     0     0>
+            , <&key_physical_attrs 100 100  600  300       0     0     0>
+            , <&key_physical_attrs 100 100  700  300       0     0     0>
+            , <&key_physical_attrs 100 100  800  300       0     0     0>
+            , <&key_physical_attrs 100 100  900  300       0     0     0>
+            , <&key_physical_attrs 100 100 1000  300       0     0     0>
+            , <&key_physical_attrs 100 100 1100  300       0     0     0>
+            , <&key_physical_attrs 100 100 1200  300       0     0     0>
+            , <&key_physical_attrs 100 100    0  400       0     0     0>
+            , <&key_physical_attrs 100 100  100  400       0     0     0>
+            , <&key_physical_attrs 100 100  200  400       0     0     0>
+            , <&key_physical_attrs 100 100  300  400       0     0     0>
+            , <&key_physical_attrs 100 100  400  400       0     0     0>
+            , <&key_physical_attrs 100 100  500  400       0     0     0>
+            , <&key_physical_attrs 100 100  600  400       0     0     0>
+            , <&key_physical_attrs 100 100  700  400       0     0     0>
+            , <&key_physical_attrs 100 100  800  400       0     0     0>
+            , <&key_physical_attrs 100 100  900  400       0     0     0>
+            , <&key_physical_attrs 100 100 1000  400       0     0     0>
+            , <&key_physical_attrs 100 100 1100  400       0     0     0>
+            , <&key_physical_attrs 100 100 1200  400       0     0     0>
+            ;
+   };
+
    chosen {
      zmk,kscan = &kscan;
      zmk,matrix_transform = &m66;