Simple simbols puzzles

This is an easy to solve puzzle made from 8 sliding pcs. inside a simple 2 pcs. frame.
After a lot of trial and error I finally found the right tolerance between puzzle pieces and frame in order to have a smooth slide.The tolerance may differ from printer to printer, or the printing material used may affect the tolerance, in this case you can slightly adjust de dimension of the frame or the puzzle pieces in cura or whatever slicer you use.
For more info check out my youtube video:https://www.youtube.com/watch?v=vy_fheOfNcs