Re flapperons on Avistar -- I made the mod on mine -- however have trouble getting the "amount of control surface movement" set up. I have a computerized radio (JR421EX) which provides flapperon control, however the flapperon and aileron movement on opposite sides cannot be set equal unless I set the "travel adjustment" for ailerons to 100%. This results because the gear (5th channel) is used to set the amount of flapperon movement and the aileron travel adjustment only affects one aileron. If any travel adjustment on the ailerons other than 100% is used, the result is that one aileron moves more than the other when the aileron stick is moved, and one flapperon moves more than the other when flapperons are activated. I started flying the Avistar at +-70% travel adjustment on ailerons (which gave me mfg recommended movement) and have gradually moved up to 80%, trying to get up to 100% aileron travel adjustment so I can try the flapperons. (Want to make sure I can handle the amount of aileron control surface movement I'm going to get at 100% of travel) And, yes, in conjunction with adding travel I have moved the position of the control rod in the servo arm to compensate.

I have concluded that this is a restriction of the radio (bottom of the line computerized radio), but if someone knows of a way around it, please advise.