Hanging Spool Holder
thingiverse
This spool holder can be used on a flat surface such as a bench, or it can be hung on a wall near the printer with two screws or nails. It fits most "standard" spools, but can be scaled in the slicer to make it wider, decrease the diameter of the drum, etc. Be sure to separate the individual parts (in Cura they call this "ungroup models") in order to orient them in the best way to be printed on your machine. I use a bit of CA glue to assemble the pinions to the drum, that seems to give the most reliable joint.
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