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This should do the trick!!!Im using the same radio and receiver as you are on a Z230 gasser, you only need the servo buffer on certain futaba pcm receivers, On mine, I didnt even plug in the remote lead on the co-pilot, it works fine, just be sure to set the gain at about 60%, also check that your elevator and aileron leads are not plugged into the co-pilot computer backwards!, the brown wire should be to the OUTSIDE of the computer module, when looking at it from the top, try re-plugging in these two servo wires again, it should come to life!!, I did this when I first installed mine and it would not work at all., Hopes this helps you out! Joe.