Yep, I agree with Cuda. I didn't use the large scale horns on the ailerons as GP suggests, I used smaller nylon horns with four #2 screws in each and just wicked in some thin CA. Just be sure to let the CA cure completely before you put the screws back in. I've had no problems with mine. I'll also agree with Cuda that this is a great scale flying plane, it's not designed for speed or wild arobatics. I have an OS 61FX in mine and it flys very scale, even at half throttle, a 1.20 is gonna be a bit much.
You also don't need flaps on this bird, it's got so much wing that it doesn't want to come down as it is. When I'm flying mine in calm or very light winds I chop the throttle to idle on the down wind leg. The supplied gear works very well, just be sure to hold full up elevator when taxiing on grass and at the start of takeoff.