Would someone please explain to me how the sealant/caulking seals the wedge area. Where would water leak into? I don't understand the engineering/design here. The wedges hold the pin but they don't really wedge anything unless the boat is upside down. The stainless plates hold the wedges in. The screws hold the plates. What needs waterproofing? I thought after I took it all apart I would have a better understanding but nope, not me. I put sealant where I removed the old but can't understand zactly what I'm doin'. thanx, gene