Marv:

Correct on all points. My finished product looks exactly like the Higbee pictured.

When I was making the fidgets, I also used a variety of materials, such as plastic, brass, and aluminum. Since these are such soft materials, it didn't occur to me to start by turning the screw. Would certainly have made the steel one go faster... (where IS that "embarrassed" emoji)

I really love the collaboration on this Forum. Post something interesting and people jump right in to refine, expand, analyze, improve, etc.