Having fixed a fair amount a wet blasa core, I'd be surprised if core saturation has much to do with it. IT's only 3/4" thick and even badly soaked core still floats, mine did anyway. Water weighs something like 60# a cubic foot. To get 1000 punds you'd have to get about 18 cubic feet of water into the core?? I think this would be very obvious! Clint I think there's some water in the deck of your boat. Check carefully around the rope clutches I recall a few soft spots, but a couple punds of water maybe, not 1000!