Lots of room now for the the required lines for the outboard. I fabricated a plywood base for the oil tank, then used epoxy resin to seal all sides. This was then bolted to the stringers in case I should need to remove it. All holes penetrating the transom where over-drilled, then sealed with epoxy. No wood is exposed to the potential of water penetration. All the ss bolts securing the motor bracket were drilled out, then filled with epoxy; then redrilled to fit the bolts. The hardest part of the retrofit, was the sanding smooth of the old transom, and then the 3 coats of gelcoat to seal the new fiberglass covering the backing plate. Spraying on the inhibitor, allowing time to cure, then washing off all the sealant to prep for another coat of gel was a long process, but well worth it in the long run. I can now spray down the entire inside of the old motor well for rinse-down with no "unsealed" wood being exposed.