Hat Trick puzzle

Award winning puzzle by  Laszlo Molnar, which got a TOP 10 award at IPP 2019. It’s a packing puzzle, the goal is to put all 6 same pieces into the box. It may look easy but has a difficult to find Aha! moment.

Buy online: https://woodwondersonline.com/products/hat-trick

Modeling using puzzlecad, an open source OpenSCAD library. Source code is also uploaded. Download puzzlecad library, put hat-trick.scad into the folder and open it. Then you can easily change size, inset, bevel, etc.

Each piece can be easily printed without support (recommended). But if you prefer to make it more like the original wooden version, piece with a snap joint is also provided (not recommended. If you insist, use at least 20% infill so that the joint is strong enough).

I did some testing, and current parameters should work smoothly. If you want those pieces fit even more perfectly, feel free to adjust $box_inset. $box_inset down to 0.12 in all 3 axis still works theoretically. But if your extrud