Expansion Blank

thingiverse

I found the original model too fragile and the screw hole snapped apart very easily. I've reinforced it by making it thicker and adding a central rib for added strength. I also made the screw mounting face thicker and altered the 90-degree angle with a small fillet to improve its overall strength. Furthermore, I added more material to the entire face to provide even greater durability. Don't get me wrong; this design is still relatively easy to break when removing the support from the screw hole, but it's significantly sturdier now.