Geoffrey,
I'm with Greg on this one.
Though my experience is primarily with R/C airplanes, I've had enough nylon clevis, and CA hinge failures, to swear off both of them forever. Pinned barrel hinges, and captive ball links, can't be beat for reliability.
Also found that threaded push rods can vary greatly in size. Some use swaged threads, rather than die cut. The swaged threads are not as deep, or as sharp as die cut threads, and can some times be pulled right out of a properly threaded clevice.
When you going to bring the good looking airplane to Delta Park?
Bill