I'm flying it with a JR 9503 2.4gHz.

While I can set a switch for various "flight modes" I have the rates for each control surface individually controlled by switches.

Upper left switch for aileron rates, upper right for elevator, the next upper right for rudder.

My MIX switch controls enabling/disabling any correctional mixes, and my gear switch controls elevator to reflex mixing... ( for easier "Elevator" stunts ).

I find no need for flaperons. I tried it for a while and decided I'd never use it and opted for correctional mixing e.g. a small rudder to elevator mix for knife edges...

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What TX do you have?