Tech support. the best technical support: we will help you succeed! all our plans and kits come with full technical support. ask questions on our support web site. General purpose 21′ hull, several wood boat plans to choose from. learn how to build a plywood boat with any of these options: work boat, tour boat, bass boat, deck. How fast does it go? for estimating the speed for small outboard planing boats see planing speed boat chart. this chart should be used for general estimates only..