Da Rock,

THANK YOU for helping me out with this! I flipped the upper aileron control horn around and put it on top of the aileron instead of the bottom and, presto! perfect synchronized travel from all 4 ailerons. I didn't even have to notch the TE. I did have to debond the CA holding the control horn in (it's an electric plane...no screws in the horns) and that's the part I was concerned about but things are perfect now.

Since this is such an obvious problem and an easy fix, I wonder why these model engineers don't address this when designing these ARFs.

I guess it's all about the $$.

I have a CG Pitts P-12 Monster waiting to be built and I will once again be modifying the aileron linkage on that too.

Thanks again.