Monoprice Mini Spool Holder
thingiverse
A one-piece spool holder that centers the spool to the extruder more effectively than any I've seen is truly impressive. To reduce friction even further, I wrapped plumber's Teflon tape around the arbor, but this step is entirely optional. This device mounts seamlessly on the Monoprice spool holder. The arbor is cleverly angled to compensate for the slight slop in the Monoprice bracket. When a spool is loaded, it should be perfectly level.
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