I´m having some noise in channel 2 (left elevon of my X8 wing) and not on channel 1, so I want to change channel 2 output to channel 6 output so I can get rid of the noise. I tried to change (in mission planner config) the RC5_function to aileron, but it only woks in manual mode, it doesn´t stabilize. Can I just change the elevon output to another channel? If yes, how?

About the noise, the servo keeps moving, its a little movement and I tried everything, other servos, disconnecting RFD900, ESC, etc... and nothing solved this noise, and its only channel 2. 

Thanks