Belt Driven CR-10 Dual Z using a single stepper motor

This is my first try at posting a “thing” on Thingiverse so hopefully this will be useful to some.

I have a CR-10 and had ordered the “Dual Z” modification kit which came with a second stepper motor. Before I installed it I heard of instances where the separate steppers could get out of sync. I also had come across several examples that used a belt to drive a second Z instead of a second stepper motor. I liked that idea so I decided to design some parts that would utilize the factory Z screw