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 designs that are simple to build, rugged and seaworthy. if you’ve ever wanted to build your own boat, wood, aluminum, or stitch-and-glue, you’ve come to the right place. Boat plans » stitch & glue designs. our standard boat plans are on 24" x 36" paper; parts that fit within those dimensions are shown full size. other components are scaled and dimensioned. shearwaters, shearwater hybrids, wood ducks, sea island sport, matunuck, and all of our strip-planked kayaks feature full-size plans sets that show all parts at their full size.. Stitching. basically, stitch and glue boats are constructed by gluing panels of plywood together using epoxy resin and fiberglass. the stitching is used to hold the panels in place while the glue is applied and allowed to cure..