Spira international wooden boat plans. following are the stock plans available for the various types of boats, separated into the different categories.. Thanks to the great interest in our custom built skiffs we are now offering the complete set of ladybug boats commercial skiff plans. our goal has always been to. Wooden skiff boat plans and kits. the term skiff is used in this page to describe a flat bottomed boat (or mostly flat) with a pointed bow and square back..