Printrbot Metal Plus Filament Spool Holder

*** 9/4/15 - Please check out my new rollers upgrade that are a big improvement over the earlier roller bearings:
http://www.thingiverse.com/thing:999851 ***

*** 2/11/2015 - v2 added with raised bars (+15mm) to prevent the extruder motor hitting small diameter spools when printing at full 250mm height ***

This is a simple spool holder for the Printrbot Metal Plus (model 1412).

It provides a lower friction feed than placing spools directly on top of the powder-coated metal case