Summary

Just another spool holder.
For Makerbot Replicator2 running Hatchbox 55mm I.D. spools.
Eliminates drag causing uneven extrusion.

Uses 2x 1412 Plastic Bearings, McMaster-Carr part# 6455K43 ~$6.50 each.

Print with a minimum of 4 shells using a .4mm nozzle.
Recommend .2mm layer height.