Interesting thread. I myself am wondering what kind of servo-to-pushrod connection I should use on a UCD. The kit came with 2-56 rods and instructs me to use an L-bend and apply a plastic snap lock. I definately do not like this method especially for elevator and ailerons. I thought about z-bends, but I don't really like the fact that it has "high-slop" potential.

I've never used ball-links, but I'm kind of leaning in that direction. They have good adjustability and no friction with the servo arm. They also can keep the pushrod from binding if things aren't perfectly aligned. But I look at them and I wonder how good is the connection between the ball and the actual cap? Has anyone ever had one of these things pop off in flight I guess it's a mental thing for me to get over (just like the thought of using nylon wing bolts).

I am using the black screw-on Dubro clevises with the little brass snap retainer on the horn end. I've had good luck with these in the past.