I accidentally put in "positive" expo on a Futaba for a 27% Extra and nearly totalled it, it flew so erratic! That was the maiden flight too! Got it down and worked through the bugs till I realized that I input the expos the wrong way! Took them out to zero and it then flew like a trainer. Be careful. By the way, I have the same 6EXA radio but replaced it with a JR9303 after realizing the little Fut limitations.

MPB