Check your aileron Y lead! A fellow club member had a very lucky escape last Sunday when, two minutes into its maiden flight, his new 1/4 scale Extra performed two uncommanded rolls! luckily he was able to land it OK. On checking the radio installation, he found that the new aileron Y lead was faulty. The center joint had been badly made (it was actually butt-jointed!) and was making intermittent contact. Hope you find your problem.