I’ve found some pretty interesting stuff in the public section of OnShape. Lots of existing models of things I can use in my other designs. Like building the case for an Archim board. The model was already made and I could dimension off it. It’s a long way around.
I guess I do things based on what materials I have or what purpose something is for. If you want to try out my slip fit 125x125mm box, be my guest. It works great. If you haven’t installed the Kiri:Moto plugin, do so. And set it up for CNC. I posted my settings in the Kiri:Moto topic It makes this box perfectly. Just need two 20mm thick boards that are at least 125mm x 125 mm.
https://cad.onshape.com/documents/d41d3787bfb255885631fda8/w/06e0d3d81ec2c16aa668059c/e/eb068a331a345c2e74d2d794
Takes about an hour and 45 minutes to cut each side. It fits perfect though.