A direct replacement for the twist-lock axle used on Creality models. Tested on an Ender 3 v2, K1 Max and Ender 5 S1. It has a larger end-stop on the rod to make reels more secure. You might just want to colour-coordinate your setup? The side-mounted bracket (as pictured) for my K1 Max is also available in my models.

This will print without supports but I did use a brim to make sure it stuck.

This twist-lock design fits the original spool holder mount and many 3rd party designs using the same dimensions for the locking mechanism. I've printed in PETG with 15% gyroid infill and 4 walls.