Smooth out the sphere

headrest-button.scad

@@ -51,7 +51,7 @@ rotate(180, [1, 0, 0]) {
                     }
                         // A little curvature on outside where you press the button
                         resize([button_od*.75, button_od*.75, button_curvature_depth+3]) {
-                            sphere(r=10);
+                            sphere(r=10, , $fn=360);
                         }
                     }