The Ouachitas seem to be all made with the transom wood put in and then the aluminum sheeting is welded in afterwards. My 16DSV (semi-v) was totally encased in aluminum, with the interior plate running to within an inch of the bottom of the transom board, and another piece run up from the hull under the wood and over the front face, then going under the top aluminum piece covering the face of the wood completely. I had to remove the transom brace and drill out the 7 rivets in the under plate, then cut off most of the upper piece as well. Here is a picture of the finished transom. I used 2 layers of exterior plywood 3/4" and predrilled all holes, then sealed in epoxy. Not as much work as I was afraid it would be when I first started it! Yours looks like it turned out great!