I’m working on a project, where I need a case.
So I designed a box in the idea in my mind, that printing two from the same part will fit together face to face.
So I have added overhangs, and groves that should meet.
But in the end it turned out that they don’t fit.
And the reason of that is, when I flip the part to the top, I will flip it around in one axis only. That means, the overhangs and grooves will be mirrored one times only.
So the solution is to mirror one piece before the print on any side faces.
Fixed design available at: https://www.thingiverse.com/thing:2369703