ANY plane with large control surfaces and improper setup is prone to flutter. The servos stripping speaks volumes. If they were metal gear they wouldn't have stripped, if the linkage was set up better nylon gears wouldn't have stripped.
Make sure you don't step on the top rung of the ladder and don't set the cruise control and leave the wheel to make coffee while driving down the road in the Winnabago.
Tower, Hobbico, Great Planes, they are all owned by the same company.