The classic puzzle as an SCAD customizer.
The version in the photo is toh_defaults.stl. I haven't tried to print any other variants.
Use the test mode
...さらに表示 ("Part" parameter) to see what the assembled puzzle will look like. This one is not intended to be printed.
There are a few safeguards in the code against weird inputs, but it's probably possible to break the customizer in ways I haven't thought of. So don't do that.
