Carl, and All,
First thanks for the answers and anyone else who has input, feel free to jump in. The issue of corrosion probably should go together with metal fatigue. Carl you are, in my opinion correct about the corrosion and to my knowledge there has not been any in-fight break-up of a Cessna under normal circumstances. (discounting getting caught in a thunderstorm--then all bets are off.) The design is strong and apparently well built. My idea in this thread was to get what the membership have come up with and I would still like for all to contribute so that newer members can benfit. I know some of these topics have been beat to death, and like a wheelmark keep coming up. But, I would rather discuss too much, review, and be safe than to keep quite and hear about someone digging a hole with a plane. Thanks again.
Bill