diff --git a/sw270.scad b/sw270.scad
index 2f8bc30..967e15e 100644
--- a/sw270.scad
+++ b/sw270.scad
@@ -15,15 +15,16 @@ BD = B - M; // Bushing offset
 
 echo("Internal volume", I*I*I/1000000, "L");
 
-module sam300d_flush_mount() {
-    offset(r=BD) square([255, 188], center=true);
-}
-
 // Side panels
 translate([I+J/2, 0]) {
   difference() {
     square([I + J, I - BD], center=true);
-    sam300d_flush_mount();
+
+    // SAM 300D
+    difference() {
+      offset(r=BD/2) square([255+0.3, 188+0.3], center=true);
+      offset(r=BD/2) square([255-20, 188-20], center=true);
+    }
       
     // Alignment squares
     translate([O/2,0]) rotate(45) square(A, center=true);