Ziro Spool Storage Drawers

This is a storage drawer/box that will fit inside any 1Kg spool from ZIRO. A single M4 screw should work to attach the drawer.

You can put all four drawers and fully open them.
If you want to store small bits, I've included some dividers that you can put in the drawer.

Drawers can be printed with no support at all. Walls are 1.2mm so it should only requires 3 walls with a 0.4 nozzle.

Edit (04/04/2019) : I've added a middle piece to stack spools. This will only keep the spools together, but it won't allow you to carry the stack by holding the top spool only...