Laser Rotary Attachment

This is a revamp of a rotary attachment I found online about 2 years ago. The inspiration came from https://www.thingiverse.com/thing:1359528. This uses 2 steppers and both ends are fully adjustable. I don't show the hardware but everything uses M4 screws except the motor mounts for the Nema 17's steppers. I mocked this up in Autodesk Inventor and then used the model as a general outline and didn't built it exactly to print. The wheels are turned on the lathe using 1 1/4" aluminum stock with a s