Yeah I see what you mean, I only meant that there could be some mixing of function on the rudder channel and you could see if the ESC operates in a linear or predictable fashion on the rudder channel, without the gyro. Once you eliminate that unwanted mixing, or function or feature or whatever, you could then hook the gyro back on.

Maybe you could ask in the JR and Spectrum radios forum?

Good luck with your problem, I know it can get pretty frustrating with all the functions that are available in computer radios these days.
George