Tom - To be honest, we arn't to sure either ourselves...haha. We went with a McKenzie style so I guess you could say a McKenzie with a twist! Just now getting the sides up and the bottom may be ready to install tomorrow. Not keep it natural wood, so looking at adding fiberglass and resin possibly next week. Plans were made up by my good friend Larry who has never built one before so we took on the project and so far so good. Water testing will be the big one! haha