My 376 has a wing keel. The bilge goes down about 2'+ The wing blub bolts on down at the bottom of the bilge. I mentioned this to one sailor and he said no way. No way would 5,400 lbs be bolted directly to fiberglass that is hanging down two feet. He says there has to be some kind of metal support that's being glassed in. Anybody know how the full keel is made?