There is. It appears to be about 1/8 thick from what I can tell. From the inside of the transom to the outside it is: 1/8 in. glass, a 1/4 in. aluminum plate, 1/4 in. plywood, 1/4 in. glass, gelcoat. I'm pretty sure the plywood is cut to the shape of the transom and glued in there. I'm not sure how it all goes together exactly. You can see in the pictures I added that there is some separation between the inner layer of glass and the deck/lip of the transom. I figure I will fill everything in there and probably lay up a little glass first before I glue the new aluminum plate back in.
http://s1319.photobucket.com/user/jsautry/library/?sort=2&page=1I really did consider putting ports in the sterns, but I just hate the thought of water getting into the hulls. I had problems with delamination in a previous set of hulls and I can imagine that ports in that curved area of the hull could possibly lead to some delam. I also thought of cutting into the hull to thru-bolt and repairing the deck, but if something were to work loose later that would be another round of having to gain access to the inside of the boat. I figured replacing the aluminum plate, plywood, and layers of glass would bring it back to a more "original" state. I will also have the option of removing the gudgeons if that is ever necessary. This will also give me all new stuff to drill and tap into, so hopefully I can keep everything in place and water-tight.
