The A9 only has one setting for expo. That is a percentage. That percentage is the same for both sides of center. I do like the ease of programing the A9, but would now opt for the 9X as it is the new model. I've been very happy with my A9 but it will occasionally turn on with a blank screen. Maybe once out of every 75 power ups. Turn it off and back on and all is OK. Personally I've been considering the Taranis as my next TX. "They" say programing is a little more complex but it will do anything you wish. I've not held one in my hands so can't comment on how it feels. I did purchase a couple of the FrSky RX's for my A9. I bought the Delta 8 and the 4 channel for my DLG. http://alofthobbies.com/radio/frsky-...ompatible.html So far, they have been flawless.

Ken