hi guys got a problem with my extra maidened it week ago everything checcked and double checked all trims spot on center of gravity fine both ways got an os fs 61 max in her revved her up for take off bit of elevator it turned left rapidily had to give full right rudder in air about 2 feet turned to left flipped over and flew into bund on edge of runway took her home fixed the bit of damage a friend who is top flyer took it off next weekend and it done exactly the same any idea what causes this im puzzled all tail and wing lined up cant suss it help appreciated