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Folks, agree that foaming in may not be the ideal solution, but the tank in our 21 ft Revenge I bought last year only lasted 36 years, in salt water use, surrounded by saturated foam without leaking. Might be a rare exception, but I doubt it after talking with others. Top straps were severely corroded and had to be remade with the tank. I did have the tank remade with a bit heavier material, but remounted it in like the original. Figured I'd check it in another 20 years...if I make it. Check out my personal page for details.

There is a real tendency by most of us to "improve" everything we touch on our treasures. I am guilty more than most. However, after reading everything I could find on the subject, I felt I was worrying about something that really was fine for the mission. If it only last another 20 years, that will be OK.