Welcome to spira international home-built boat plans. spira international offers boat; 14′ stitch and glue glue boat; 19′ v-bottom dory; 13′ lightweight duck. Stitch and glue boat building: definition: a stitch and glue boat hull is made of plywood panels assembled with fiberglass tape. contrary to traditional boat building. … (shearwater or wood duck) (md) mar 20-25: stitch-and-glue boat plans » stitch & glue has revolutionized and revitalized wooden boat building. stitch-and.