Good luck with thoes weights on that big of a boat! I just built a Hybrid duck boat, you can find them on the Refuge under boats and blinds. I dont have a finshed picture yet, Its not done all the way yet, I plan on test floating it today. Mine is 8 foot and weighs 60 + lbs. Made of 1/4 in plywood and fiberglass. I will take a look at your plans.