Hi, Need help pls. I'm facing some issue with my REX 10 Assist, when i go to Heading Hold mode.

I use Flight modes for controlling Expo and Dual Rates - on these Assist REX's are we not suppose to use Flight models?

Because when i switch flight modes on Heading Hold mode the elevator gyro goes all strange and starts to move up. not able to understand why this is happening.
suppose i have done the Quick Wizard on Flight Model 2 and if i switch to Flight mode 1 or Normal the elevator just looses it.

pls suggest is there some thing wrong with the REX 10 Assist or we not support to have the flight modes on these Gyros?