Made a simple spool holder for M3D printer and its own small filament spools with diameter of 120mm. This helps using M3D with external filament input. Easily detachable pieces fit along with the spool inside M3D cube when taking the printer with you, so there's no need to remove the filament during the transfer.

Print 2 pcs of spoolholder, one regular & one mirror.

Printable with M3D (one at a time, placed diagonally on the printbed).