You seem to have some rather uncommon opinions of the Four Star 60. I would never suggest that your opinions or observations are wrong or unfounded, merely that I am surprised to hear them. I have seen many Four Star 60s fly at my club, and have never seen nor heard any of things that you describe. I own two of them, also. Neither one of them exhibits any of the idiosyncrasies that you have mentioned, except for a slight amount of "fall off" in true knife-edge flight. As far as the vibrations and strange sounds are concerned, perhaps it is your covering vibrating. Sometimes slightly loose or very taught covering will amplify engine vibes and sound like flutter. There is a good amount of open space on the back of the fuselage that could be doing this. The gear coming off is not necessarily any more common to a Four Star in a bad landing than it is in any other model airplane during a bad landing.

Lachlan