Bevel edges

v1/scad/lib/generic/spoolmount_hook.scad

@@ -1,4 +1,6 @@
 module spoolmount_hook() {
+    difference() {
+        // Hook body
         linear_extrude(9) {
             polygon(points=[
                 [0, 0],
@@ -19,6 +21,28 @@ module spoolmount_hook() {
             translate([8, 8])
             circle(r=2, $fn=50);
         }
+
+        // Corner cutouts
+        {
+            translate([9, 10.5, -0.5])
+            rotate([90, 0, 90])
+            linear_extrude(3, center=true)
+            polygon(points=[
+                [0, 0],
+                [2, 0],
+                [2, 2],
+            ]);
+
+            translate([9, 10.5, 9.5])
+            rotate([-90, 0, 90])
+            linear_extrude(3, center=true)
+            polygon(points=[
+                [0, 0],
+                [2, 0],
+                [2, 2],
+            ]);
+        }
+    }
 }
 
 spoolmount_hook();