I flew my with the recommended low rates except for ailerons which I increased for IMAC. I had the CG at the back of the range and it was still a baby to land. As for High rates I put in about 45 degrees in the rudder and elevators. I had to put in a good 2 1/2 to 3 degrees of right thrust. With high rate elevator the plane would not tip a wing in a stall. It would do a beautiful elevator. Kick in a little throttle and the elevator turns into a harrier. I hope this helps.