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.. This directory includes all of the plans that are specifically designed for stitch and glue construction. the rc model x-1 is an inexpensive way to try out this popular contruction method.. The quick and cost-effective way to build the boat of your dreams. in this much-anticipated second edition of the cutting-edge book on boatbuilding, pioneer sam devlin gives you the plans and expert advice you need to apply his highly developed, easy-to-use stitch-and-glue technique to a wide variety of boats ranging in size from 7 to 55 feet. this new and expanded edition of devlin’s stitch.