I agree that putting in dual servos is probably not worth the time and effort. I flew several Kougers over the years and they all had only one servo on the ailerons. It flew fine and there was never a problem.
Actually, I not even sure how using 2 servos for all the controils ever got started. We used to fly .60 size pattern ships, pylon racers, etc. and never used 2 servos. Oh well. that's progress!
Rod
PS, I looked back in the post, DUH....that's what happens when you get old and forget....LOL. I had one very similar to that scheme. I had bomb props on it too. It's gonna sweet when you're done !