What material is commonly used? In my mind, I am thinking that brass or alluminum might be heavy. Would a person look for nylon or plastic?

For some reason, I am thinking that brass against brass or alluminum could be a problem and pit, then bind, if debris entered the assembly at all. Was this ever an issue with this design?

I am seriously considering this approach to another build I am currently finishing. This would solve the geometry problems I've been wrapping my brain around.

I've been modeling for almost 18 years and I have never run across this set-up before. (Probably because I am just entering this avenue of aircraft recently!)

I love the fact that I am learning new ways to think things through!

Brian