Design for 3D-Printing - Rahix' Blog
this is a tremendous resource, wow
Adding Crush Ribs To 3D Printed Parts For A Better Press Fit | Hackaday
crush ribs: "a set of very small standoffs that deform as a part is press-fit into them. Instead of a piece of hardware making contact with the entire inside surface of a hole, it makes contact only with the crush ribs. Press fitting a part into crush ribs is far easier (and more forgiving) than trying to get the entire mating surface exactly right." tried this out and... it really does work?!