Models to start designing inserts for Stack-Tech Low-Profile Organisers. The overall tolerance is pretty tight (needs to be pushed in and does not just slide out or around), although some of the features like the grooves for the 3 ribs and the 2 boxes for the locking mechanism are not very tight. It works for my purpose and doesn't cause any issues other than losing a bit of space. I may update in the future to make these tighter.

One is a solid blank so that you can negatively model the insert to fit whatever you want to store. The other is a shell if you just want one big bin, I guess.