125mm Sandpaper Storage version 2

I liked my earlier design, but found it tricky to extract individual discs sometimes. This design removes that issue as it uses removable “drawers”. The drawers are held in place with 10Øx3mm magnets though these aren't entirely necessary.
 

This design also means you can mix and match for your specific sandpaper collection.

Print shelves lying flat, and the base unit on it's back.
By using no top or bottom layers on the drawers, it should be quite feasible to print it in less than 400gm of filament. With top and bottom layers it's more like 600gm. I've also included a base unit with some cutouts if you want to try and save a bit more filament.