It has the be the radio because when I use a different one everything works ok. Someone else had the same issue Ardurover calibration not working but and they were able to connect to UART ( not sure I how that is done) and they fixed it. I don’t think mine has UART, I think mine is PWM. The weird part is that if I plug in only one channel, that channel works properly. If plug in two or more they all merge and they’re not even centered or to at the min.