Snap-fit enclosures that survive a second print
Tolerances, wall thickness and why your first lid never fits.
Start with the gap
Leave 0.2 mm between mating parts for a typical 0.4 mm nozzle, then adjust for your printer.
Walls
Two to three perimeters make a snap arm that flexes without cracking.
This is a short sample guide. Replace it with the real write-up.