i did not use the supplied 2-56 hardware, i replaced it with 4-40 for the elevators and the rudder.
no, i do not think it was flutter, i have had that happen before on other models, and you can hear it fluttering, but this made no noise at all. just all of a sudden the stab was floating down and the plane began a right bank.
i still haven't decided what to do. i can ifx it by building a new stab and elevators, and repairing the landing gear block (something anyone who flies arf's knows how to do quite well). and patching all the covering up.
i'm just afraid that if i cut off the surfaces and send it back that GP will find some reason to not replace it, and then the plane is ruined.
and no, i did not cut the covering off the stab when i installed it, so no worries there.
tony