Cubic Trisection puzzle

So i saw this cool model on NYC CNC's youtube channel and went about getting the original grabcad file, listed below and 3d printing it, its a neat little puzzle (not really a puzzle) but its a cool look at how geometry that doesnt look like it fits together, does!

simply print 3 of the same stl and off you go, i printed one in a different colour so u can see the shapes and the contrast.

i upscaled it to 60mm from the original 1"

Credits to macman134
https://grabcad.com/library/cubic-