Assuming that you are using a computer radio, be sure to add some down elevator mix with the flaps on this plane, as without it the plane will balloon once you drop the flaps. Take the plane up 2 mistakes high, drop to < 1/4 throttle, wait for the plane to slow down and then "experiment" with the flaps to see just how much down elevator you need. On my Ultra-Stick 60, I have about 26% down elevator trim programmed in, but as the Ads say, "your results may vary".