My boats and boatbuilding related content navigation page. good info on ropes, knots and mastmaking. expanded articles on characteristics of carbon fiber and kevlar.. A few months ago brian contacted me, asking a few questions regarding the capacity of my coroplast boat designs. i tend to be over cautious when specifying maximum. There are many designs and plans for building boats from one sheet of plywood. here are some designs and links to free one sheet boat plans.