Welcome to spira international home-built boat plans. spira international offers a wide variety of different power, rowing, and sailing skiffs, dories, and other boat. Ski boats, runabouts, fishing boats, and speed boats, cruisers, workboats and more… about our plans & kits. Power sharpie.kayleigh is a power sharpie: from her clipper bow to her high, tucked transom, she is every inch a classic. the flat, rockered bottom provides easy.