[other tom]

I did it the way Hermco and the Labatts beer boat did it, just made sure to overlay 3 layers of 1808 after adding some fillets to all sides of the 'ducer sticking up in the bilge. My boat was one the lift though, and the looks I got when I took a hole saw and cut a perfectly good hole in the bottom of a boat sitting over water were priceless....did it that way on the Bertram for 2 'ducers, but it took a stronger saw to cut through that beast....Warthog's solution is well engineered, fo sure.