3D Puzzle

This nine piece puzzle is easy to print and fun to solve. It prints without support and raft, and since the parts are made from cuboids you can use thick layers, without worrying about quality to much. It prints fine with 0.25 mm layer height in about 1h.
The part tolerances seem to work just fine, so I wouldn't recommend scaling it smaller.

You need 9 pieces in total.
* 5x Part 1a
* 1x Part 1b
* 2x Part 2a
* 1x Part 2b