UPDATE 1/12/2024: It's (finally) posted on Printables, you can find it here:
https://www.printables.com/model/710154-gridfinity-box-for-stuff-bfs
- Improved label design with more robust pins.
- Improved handle design (which should be easier to install)
https://www.printables.com/model/710154-gridfinity-box-for-stuff-bfs-20-bin-version-20