Remix of "Wave Puzzle 7" by ThinkingPegasis. (https://www.thingiverse.com/thing:3739933)
Changes and/or improvements over the original:
Thicker pieces
Pre-flipped a few of the tiles to not give the solver a hint based on the surface texture.
Added fillets to soften some of the hard edges.
Included are the STL files (frame and 7 tiles), as well as the original 2D vector drawings by ThinkingPegasis -- which are suitable for laser cutting or CNC routing.
I have also included the Fusion 360 project if you would like to make further changes.
Resolution: 0.2 or 0.3 work fine.
Infill: I used 12%
The author remixed this model.