Ender 3 Side Spool Holder
thingiverse
Just a super simple, one piece, side mounted spool holder for the ender 3. Made to fit the aluminum extrusion tightly (~0.3mm tolerances) from the front, but just mirror to mount from the back. Very stable, unlike some other side spool options I've tried... If it doesn't fit you Ender 3 [pro] bed, you need to reduce your skirt distance to 5mm.
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