[tsubaki]

I know you ain’t going to have the panels I had, you can make them up ahead of time and probably do better than we did by making them about 1” thick and pouring glass between the hulls and panel. The inside of the transom was comprised of ¾ & ½” pieces of plywood which came to 1 ¼” inside thickness. I wouldn’t worry about trying to make the panels perfect, most of the strength need will be directly around the motor bolt on area. Once you pour and stuff cloth as a filler it will be fine. I calculated that it would take about 8 gallons of pure resin to fill the transom if no cloth was used. Just guessing if you built the panels you would need about 18yards of ¼ woven cloth and 6 gallons of resin.