[Briguy]

Flounder,

I redid most of my transom and closed it in 6 months ago with marine plywood. I really don't have any issues with water intrusion but I do have an issue with weight. The enclosure in the back of the transom where the motor cutout used to be must have weighed 80 to 120 pounds by the time I added glass, wood and filled it in. For the cap I used 1/2 inch corecell. The stuff is amazing. With only one layer of glass on each side, it weighed under 10 pounds and is strong enough to support me jumping up and down on it. My recommendation would be not to use wood.