d20 Dice Box Multi-Material Capable

Remix of nico_fox's excellent d20 dice box model to add number models for multi-material capable printing.

This model also uses 5mm x 1mm round magnets because that's what I could find easily.

Printed great on a Prusa i3 MK2.5S with MMU2S. Untested on other printers, so your millage may vary.