Uploaded a variation (E3_Spool Holder_V2) with extended fixing slots to allow the part base to be set flush with the bottom of the extrusion and therefore facilitate the integration of an Ender 3 foot on the spool holder. This version is untested so please treat as WIP.
I wanted a spool holder that was connected\fixed to the printer, side mounted that did not put strain \vibration on the frame. I therefore knocked this up for my latest Ender 3 Pro. I admit this may be slightly over engineered but I wanted something that was robust and would last.
Apologies in advance if there is a similar thing uploaded\published that I have not noticed.
You will need 3 x M5 x 20 mm Bolts + Nuts to attach the stock Ender 3 spool holder to the thing. You will also need 2 - 4 M4 x 10 mm Bolts + T nuts to fix into the side 2020 extrusion.
Printed with PrimaValue Orange PLA, 210C, 50C Bed,.02 resolution, 30mms, 30% infill and 3 perimeters.