Bevel edges

v1/scad/lib/generic/spoolmount_hook.scad

@@ -1,23 +1,47 @@
 module spoolmount_hook() {
-    linear_extrude(9) {
-        polygon(points=[
-            [0, 0],
-            [0, 12],
-            [1, 12],
-            [3, 10],
-            [7, 10],
-            [9, 12],
-            [10, 12],
-            [10, 8],
-            [8, 6],
-            [5, 6],
-            [5, 2],
-            [3, 2],
-            [1, 0],
-        ]);
+    difference() {
+        // Hook body
+        linear_extrude(9) {
+            polygon(points=[
+                [0, 0],
+                [0, 12],
+                [1, 12],
+                [3, 10],
+                [7, 10],
+                [9, 12],
+                [10, 12],
+                [10, 8],
+                [8, 6],
+                [5, 6],
+                [5, 2],
+                [3, 2],
+                [1, 0],
+            ]);
 
-        translate([8, 8])
-        circle(r=2, $fn=50);
+            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],
+            ]);
+        }
     }
 }