Welcome to spira international home-built boat plans. spira international offers a wide 14′ midwestern style drift boat; 15′ ultralight stitch and glue dory; 15. Boat plans » stitch & glue designs: thousands of builders have assembled chesapeake light craft’s stitch-and-glue boats northeaster dory. a dory is a lot of boat. Boat plans for a 16′ stitch and glue outboard power dory for the home boat builder. wee hunk flat bottom power dory developed for stitch and glue sheet plywood.