About this 3D model

Designed a spool holder for the new Printrbot Simple Maker's Edition. Replace the 3 M3 15mm screws on the side of the PB with M3 20mm screws (the side mount is 5mm thick) I printed this on a PB Simple Metal, so the top bar is longer than the build area on a simple maker's edition, I'll upload another file for the top mount that will print on a simple maker's edition. Sorry about that. Add a length of 3/16 or 8mm rod, I suppose you could even use threaded rod and add some lock nuts although it doesn't really spin much when you pull on the spool. Holds a 1KG spool without issue. Enjoy!