Ender 3 Filament Spool Holder Improvement

A Creality Ender 3 spool holder is much narrower than the hole in most filament spools. It leads to tangles. Here's a fix.

z axis - Ender 3 failing on the same z position every print - 3D Printing Stack Exchange

Ender 3 Filament Spool Holder Improvement

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