My deck is stripped with 5/16" strips of dark cedar and light pine. The ash stem pieces extend up past the sheerline, and terminate at the top edge of the topmost pine strip, and I cut the sheerline later with a razor saw. An added benefit is that it keeps everything lined up in place until you make the cut when the hull and deck are separated. When I laminated the stems, I held them in place with thick rubber bands, about 20 of them, cut from an old bicycle tire. The joint is tight all the way, and after planing and sanding it looks like another pine strip. Fitting the lamina into the notch at the top took some care, but if you bevel it tight and fasten it first and work toward the keel, it will behave itself. I made a clamping block out of a piece of scrap, a wedge shaped so that a fast action clamp bore on two parallel surfaces, one on the deck and the other on the clamp. Sandpaper glued to the clamp kept it from squishing around. With the rubber bands, run them doubled up under the hull, and run dowels through the loops above the deck. Good luck.