RE: WHAT SIZE SERVO ARMS?
I suppose CF arms would be okay, as I know Chris wouldn't include them if they didn't hold up to his style of flying. I wasn't aware that there were any out there.
By composite, I meant those like the big Dubro arms, which are a disaster waiting to happen if the pushrods are not directly in line with the arms (ball links). I can break them in half with my fingers.