Sorry Bill,
But it can be done very easily with any Futaba radio by using 2 of the programmed mixers.
Mix 1 - elevator into elevator with a -100% mix to cancel the stick action.
Mix 2 - elevator into elevator with a -100% mix to reverse the stick action.
Both mixes to be activated by the same switch and "ON" position.
modtron
Oxford UK
Futaba Assist UK