It's just a thought but don't rule out expanding filla-foam. However, without seeing the problem this may not be a solution. Still sounds as if you had great sail/race.
I was considering this, but fill-a-foam will soak in water even quicker than the blue foam that is installed. Fill a foam is good, if there is no contact with water. Unless you dont capsize that often, that it is a good option. But if you sail anything like me (capsize every sail) then that fill a foam is not a good idea.
