The Weekender is sure a nice design , especially for making a Foamie ... Nice straight lines , no kerfing or bending , very aerodynamic ... and it can be modified to suit your needs and taste... viewtopic.php?f=2&t=49470
And naturally here’s my “take” on it ... the rounded foam front end being easy to do , and offers a bit more aerodynamics along with the rear structure (aero fins) which theoretically should reduce drag , and provide a slight overhang to keep the weather out , should you build a Galley, or cooking storage area in the back ...