A sheet of aluminum was cut to cover most of the transom. He cut a smaller one for the inside. Bolted it together and caulked. Solid as a rock for 30 plus years. He also Machined a missing corner for the 81 Tyee.
Can you let me know how that turned outWe fixed ours by installing a piece of 1/4 inch aluminum and bolting it on. Fixed it to this day.