Compact Spool Holder and Guide for MakerFarm Prusa i3

I needed a way to mount filament spools to the back of my MakerFarm Prusa i3. Lots of designs of thingiverse are either cumbersome, really flimsy or take up too much room.

My design is compact, efficient and does not extend the space taken by the printer. You can easily fit 2 spools on a 8 inch i3. This setup would be perfect for a dual extruder mod.