Sweet caroline a 20′ dory / skiff; flat bottom dory-type, developed for sheet plywood planking. designed for use with glen-l series 1700 boat trailer plans.. See details on the epoxy plywood boat construction process of our outboard dory 18! view power dory boat plans for materials, specifications, and more.. A big dory out of just three sheets of plywood. a small dory out of just two sheets of plywood. free boat plans and building instructions. published june 25. 2008.