Premium cnc boat kits in aluminum alloy and steel welcome to metal boat kits! we offer premium quality stock boat kits in aluminum alloy and steel.. Wooden boat plans developed by a boat design expert & naval architect. all boat plans come with free 3-d computer models & free master boat builder course.. 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.