Ender3 Side Mount Reel Arm

Having seen the way the reel is mounted on my E3 Max, I decided I'd try doing the same on my E3 V1 and E3 Pro. I'd noticed a few different designs being used, but made this one from scratch to slide into the t-slots on the 4040 extrusion.

Use the Tester stl first to see if you need to resize it at all before printing the complete arm. It should slide into the two t-slots on the back-left side of the frame, you will need to pop off the plastic cover at the back.