Printrbot Filament Guide
thingiverse
My spool holder with filament guide broke, so instead of printing a new one I just made a model of only the filament guide. It's held together with a 4 mm screw and have holes for the screw head and square nut. I had these laying around from an old meccano set and it worked out nicely. For extra grip I put a little bit of tape on the inside of the clamp part. Printer: Printrbot Simple Metal w/ heated bed. Printed with PLA on 200 degrees.
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