There is no expo on 3 with the Flash 5x. After several flights I have come to the conclusion that playing with the EPA although helpful at some settings does not cure the problem altogether. I also played with the AoA of the paddles slightly to see if I could get a little more or less lift. This also helped, but once again not enough to hold it rock steady. I think the general problem is that as the batteries drain there is a continual change in lift. During the length of the battery there are times when it holds pretty still, and others when I have to juggle the throttle constantly. I'm sure it would make me a better flyer in the long run to play with the throttle, but I'm flipping the plate.
Of course now my real problem is my Tx's crap Nicads won't hold a charge longer than an hour. Time for some Lipos in there!