my chainplates are not glassed over, just throughbolted to heavy fiberglass knees, that are part of the hull.
I am not used to looking at the Original poster's setup. Can someone explain the parts in more depth. For example, is it a one piece chainplate that goes through the deck and then extends vertically for a foot or so, down the side of the hull? Is it bolted to the knee at this point? And then there is the smaller horizontal rectangular shape at the bottom - Is that part of the upper verical chainplate, or bolted to it, etc???