rowdy, I just caught up on all the posts since January, and have enjoyed reading your progress with the Intruder. Makes me want to take mine out now. I think my OS91SurpassII is getting tired because she does not make the Intruder whistle like she used to. Might need some retuning to get the speed up. I agree with Dave about this plane liking the speed to fly better, and I just checked my programming...no aileron differential on mine either. I'm no expert like Dave....I just am happy my setup sounds like his, lol! Jon