I have no problem with an Elevator into a Harrier with my Extreme Lite, however with my U Can Do the Elevator is quite good ( a little wing rock). Transforming into a Harrier with increased throttle starts the wings rocking to an alarming rate. I am using up ailerons with up elevator. Have tried varying the % mix, from 80% to 125%. It doesn't help a great deal. 125% probably wins.
An theories would be most welcome