I'm about to do a refurb on a starcraft supersport, and my question is what should I use for flotation? I don't want to use the expanding foam because I heard it holds water and will not let water run out of the boat and could clog the holes in the aluminum that allow the water to flow to the back of the boat. Big StyroFoam logs came out of the boat. Should I try Dow StyroFoam Buoyancy Billet the stuff they use for dock and other things?