Robert,

Thanks for the info on the bellcrank. I have two problems:
1) When I invert the outer arms so that they're opposite the inner arm, they don't line up perfectly. One will be vertical while the other one is a few degress off from vertical. Swapping them out left/right changes the amount they mis-match. It's not bad, but at extreme throws, it puts the elevator halves off a bit. I may put the center arm down. It looks like it would work OK.
2) The holes in the bellcrank arms are too large for a standard clevis. The DuBro clevises I used jiggle a bit when they're on the MK arms. I'll look for some MK clevices or extend the arms like you did.

You have to be sure your servo throw dosn't go too far with one of these or your bellcrank will go past 90 degrees. Then you have a toasted plane.

Yes, I plan to go to the Perry swap meet. I may bring a Cub to sell. It's being a PITA - doesn't want to take off. It prefers to do a right ground loop. I'll work on it a bit to see if I can get it to behave. I'm running out of room...

On an off-topic note, someone trashed the grass at the GMA field last night. I spent 30 minutes this morning dragging a chain link fence section around smoothing it up. They made a real mess slinging grass and mud all over the place.

-brad