RE: Hitec Digital Servo Programmer vs Futab TX
I also think that rather than hooking and unhooking your servo to and from the Rx and programmer, then taking a "guess", once the center is set and the control surface is at neutral you can program your endpoints while the servo is still connected to the control surface. It is much easier and just as accurate as the method described in post 1.
With my H9 sukhoi, I installed the servo into the wing, set it to neutral, hooked up the linkage, then began turning the knob on the programmer until I reached my desired throw. Just make sure that the mechanical advantage is at least 1:1. . It saves a lot of steps.