Actually if you are going to use a servo for each aileron you really do not need the counter balance . That setup was only for the original 1 servo in the center p-51. Unless you sre going to put a larger eng. for more speed then you might want to use them. The P-51 with the Quadra 40 in the single wing with the g-38 module flys it really nice. A lot of guys today want to fly it like a pattern plane and they stick G-62's in them without the drive unit, and they go like a bat out of hell. I prefer the 40's or 42's with the drive unit, there is nothing like that big 4 bladed prop turning. One of the reasons they went to the Quadra 42 was when they went with the 2 piece wing because the plane came out a little heavier. Any other questions feel free to ask.

bob