i had the same prob with my cap on its first flight, i wasnt so lucky though.. after a few circles on my first flight one aileron cam completely off never to be found again. long story short i lost control and down it came.. upon further inspection, the other aileron was almost completely torn off as well.. only a matter of time.. i definately will use a different hinge system on my next cap.. i was lucky and got a free replacement after sending them the defective parts