Multi-spool Universal Filament Feed System.

I really liked the filament holders that used bearings for the spool itself to roll on but always thought they were inefficient and did not scale well since they always involved large prints and only held a single spool. I set out to fix this using minimal printing and cheap parts. This system uses a series of spacers and clips to hold multiple spools on 2x8mm smooth rods (the cheap $3 kind from the hardware store not the nice kind used for printer axis) Filament catches pass filament up to pri