The bottom deck is 3mm Okoume ply from Midwest Boat Appeal in St. Bonifacius.  If you have never been there, it is definitely a great boating resource.  They stock about 10 different marine plywoods, Sitka Spruce, and Mahogany.  I asked why they have Sitka, and it is basically for the hydroplane and homebuilt aircraft guys.  Now on to mounting hull hardware and steering.
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