Extruder Indicator Dial

Saw this on the Tevo Facebook group but when I loaded the stl that was posted it was malformed so I knocked this up in 5 minutes in Fusion 360. I'd credit him/her but the name was Chinese characters and I don't speak Chinese. Google came up with Elsa so we'll go with that, thanks Elsa for the design.

It spins with the extruder easily showing when it is feeding and when it's retracting. Could even be used for some sort of calibration.
Push fit for a 5mm stepper shaft.

I've taken Elsa's design a bit further by adding a dial face with 5 degree markings that attaches to the stepper motor screws. I haven't tested it but the holes are measured to fit a standard stepper motor.