todays skis have developed of decade old concepts used in water skiing. rocker... makes it turn better and makes more floaty... taper stops catching tips and provides smoother turning.. then once my mate asked how does the a-bangs never ge water logged??? well water skiis have been made out of ply for years... not saying we havent thought of new ideas but most have evolved by older ideas... my dad actually skooled me on the idea when i was explaining the concepts ahahah