RE: Team OMP Presents the Boxxer ARF!
I agree. The only option I would ever do for 4 aileron servos would be to use HS 85MG or HS81MG on each aileron. But then you would have to Y-harness or mix them all together. Two servos in the top wing with pushrods between the "rons" is the preferred method. You could use the 645s in the tail but as Tim says they are a tad heavier than say a 325HB or equivalent.