Iphone 7/8 case for TPU with knockout opening supports

thingiverse

The source model includes knockout supports in its openings because TPU has difficulty handling bridging. Knockouts should be designed with a space between them and the rest of the model, allowing the printer to print overhangs on top of the layer below instead of fusing them together. This approach provides support during printing, preventing overhangs from sagging or drooping, while also making it easy to remove the supports after printing since they are not attached.