Mine has a bad habit of flutter in the ailerons at high speed. A good reason to throttle back! One of the guys at the field has his control horns moved to the rear of the aileron as well as beefing up the area around the servos to control flex. These mods eliminated the flutterand will roll at any speed. Yes, you lose some degree of movement on the aileron but his airplane can perform rings around my stock configuration at higher speeds!