Yeah Bill, I'm also thinking the most likely scenario is that the top of the board somehow dropped below the deck level. The daggerbd well is very lightly constructed, just designed to keep water out of the hulls., I imagine. The deck and bottom of the hull were certainly designed to carry the loads. The board did slice aft maybe 5 or 6 inches, but I'm inclined to think that was collateral damage. When I first saw the board it was canted outboard, as would be expected for the windward hull if the board did indeed drop too far. I'll have to look closely at the boards, but I think the only thing preventing them from decending below deck level is the rope handles. Some sort of positive stop is certainly to be developed.
Thanks to all for the input. I've emailed John P, and I'll try the various Inet phone options suggested. Keep it coming, I won't start til I've heard from Stealth.

Dave