I designed this spool holder for my X1C printer to hang external spools in the side of the printer.

For this project you will need double-sided tape and a metal or wooden pin with a diameter of 3mm and a length of approximately 32mm.

For the printed parts I used PLA but any material you want can be used.I printed with basic parameters, 2 walls, 15% infill.To mount the spool holder you use the screws and the position of the original spool holder, but you will need to use double-sided tape on the side. (you see Photos and Video for Assembly)