I printed the stackable bins https://www.thingiverse.com/thing:2471753 on two different machines. one in PLA and the other in PETG. The result was the pins didn't align and broke off. So I drilled the holes out with a #23 3.86mm drill and printed these pins sideways so they are stronger. They also have a taper to allow easier alignment.
I thought I 'd share in case anyone breaks the pins off.
These have a very small footprint so I printed a .12mm layer height with a .2mm first layer and used a lot of hairspray on the bed. I used PETG to make them a bit tougher.
Stacking_pin_taper.stl | 108.2KB |