I have no aileron differential on mine, have no indications of adverse yaw. Standard servo throws are very adequate, don't get carried away with too much elevator or rudder. Rudder is especially strong, this plane can do a rudder only roll, just like the original 3 channel Rascal. Fly it and see what, if any changes in control throw you want. I suppose if you crank in excessive aileron throw, you might induce adverse yaw, but doing so is out of character fo this plane. Just fly it, you will like it.