Thanks. I had planned to change the servos to high torque's because I felt I that when it went right it took so much left to get it back and that the servos were stalling.

The carbon fiber tubing is also a good idea that I will do.

You are certainly right about the actuation point being the end of the flap being a weakness. I have other deltas with the servos out on the wing allowing the horn in the middle of the flap and this is way more efficient and effective.