The answer would be yes, you can render the servo "off" with the flick of a switch. You might have problems with judges saying that you could cheat and flip the switch during a run? You could show them in the programming that it is off and physically show them on the sticks that it is rendered usless? I am not sure of the rules, but I believe that you have to have the rear completely locked out with hardware.

The way I explained before when the switch is independent mode is one way to stop the servo form moving. The other would be to simply go back to the Mix1 and set it to INH...That would turn it off completely. The best way though, would probably be to set the Mix for the rear channel to 0% instead of having a + value...That way, it would keep the rear steering "locked" because it would still be under power...I believe that if you go all the way to INH, the servo could move under the pressure/force of rocks and such. I can test that theory later on after I get home from school tonight for you....

Peace!

Z