PX4 inflight parameter tuning by rc - need help

The interface is acting a little crazy. Are there any typical scale and center values to enable a certain behavior. For me everything behaves rather coincidentally, jumps mostly with the RC command to a not clear fixed value and not back or it results in a above 8 digit high value, which changes in small ranges to RC. Repeated identical settings produce different results. What am I doing wrong? I would only like to switch off Airmode via rc below 1150uS on the RC Thottle channel. Above 1150uS trottle it would be nice Airmode is active again. For tiltrotor gliding/sailing, the propellers swung upwards must not turn under any circumstances :slight_smile:
And how can I make sure that this assignment won’t be lost after reboot.