Mike, please do check the ailerons. What I have seen is that most guys setting up dual servo aileron setups will adjust ATVs at the same percentages with the same length servo arms and control horns expecting it to result in equal throws. Seldom does that work out. Most guys never realize the loss of performance. Taking the time to balance all the throws and adding the correct amount of differential will help. That being said getting an airplane to roll exactly the same both directions is probably not going to happen. I know for a fact that I roll better to the right then to the left. This is because right is my dominate roll direction even though I do a fair amount of pylon racing and my dominate turn direction is left. Once the airplane is set up well it becomes a matter of practice.