Spaceworm, I understand what you are referring to but I did not have that luxury due to space and function. I was using two servos because I had to leave room for a retractable nose wheel to come between them. A single servo would have been too difficult to implement. I haven’t used it yet in real life but it is acting all right in the house. For now, the servos are centering properly. It would be a real nuisance if they don't when I am taxiing. Maybe it's not suitable for a control surface. I would probably have to do something different for a rudder. Dan.