Completed: Mechanism to drive module

I found that adding a key to the Acme rod and sliding a chain sprocket on acted as a perfect driver for the module. The key allows the sprocket to slide as the Acme rod moves up and down, and can rotate the rod at the same time. The sprocket can be driven by standard motorcycle chain.

Since that is the final design challenge, I am ready to start getting quotes for parts, but first I have to draft drawings of the parts. I'll be posting the drawings as I complete them.