Free plans for stitch and glue boatbuilding. many good free plywood contruction stitch and glue boat plan. stitch and glue plans are good wooden boat plans for beginners.. 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. Easy-to-build plans for boats, dories, fishing boats, drift boats, qood boats, wooden boats, plywood boats alumninum boats.