This remixed box of remix by mschiller worked perfectly for use with my
Seven Tiling puzzles https://www.thingiverse.com/thing:6779121:
which is a remix of Thirteen Tiling Puzzles by pmoews
https://www.thingiverse.com/thing:5814159
I was able to align the openings with each individual square on each piece for a nice result.
Puzzle_Box_66x66x8_2a.stl | 1.1MB |