12 FG Solution
After accidently truning on my transmitter and plane with the retract switch in the up position and making me a bit angry I found a solution. Even though there is no warning for the retract switch in the up position there is a snap roll warning. I just programed the snap roll switch to the retract switch and nulled out all of the throws so the transmiiter won't broadcast when the retract switch is in the up position. Seems to work fine on the ground.