Radio One: I have an 8U and the way you have to disable the knob will be to use a P-mix and set master and slave to channel 6 and then Null both sides of the mix, 0% for both, this will cancel out the knob but will use up one P-
mix. Hope this helps. Rick.

PS: I should have said start by activating the mix, then set both channels to 6, then set both % to minus 100% this will cancel each out, then link-off, then off set 0, then I set mine to work all the time on stick 3 which is throttle, and then set that to null. you are finished.