Cardboard corners with integrated corner brace

thingiverse

I need my shelves to be 2 inches deep, but my previous versions all had something either cut a fraction off in the cardboard sizing or the 3D print snapped or something went wrong somewhere. So I'm trying to ditch the cardboard sides, just use the cardboard for the shelves, and let the 3D printed parts provide the vertical spacing... if I've figured out the peg-and-hole sizing correctly, that is. I haven't had a chance to print these yet, so I can't swear they work or fit together correctly - just throwing them up here so they'll be easy to download at the makerspace. ETA, the pins sometimes need a little cleanup to fit into the holes, but the version with the little foot-and-hole (58 mm and 63 mm editions) work best so far. (I also tried a square peg version but that didn't work as well as the circle.) The peg is about 6.8 mm and the hole is 7.0 mm, but because the peg is free floating it tends to sag a bit on the first couple layers. The 58 mm version is when you want really close to 2 inches gap between the cardboard layers. The 63 mm version is when you want a little more space above the 2 inch limit.