Gentlemen......I agree sealing the hinge line is not a cure for flutter...no more than a cough drop is for a cold.....in my post I said that my friend sealed his hinge line.....and later his aileron servo came out of the wing with the wood that it attached to still screwed to the servo.....you must have slop somewhere to have flutter......and an aileron servo not properly attached to a wing would do it....all I am suggesting is to take a careful look at your aileron mounting bracket in the wing....as there is a history of at least one servo coming out of the wing.....Good Luck