Wing 4.5 has plenty pre-tension on the canopy(windsurf sails need plenty pre-tension too: the more the better/more performant the sail). Lying on the beach only the last third part will flapper. Light weight wing and feels light weight when foiling ( probably due to the high pre-tension). I have the impression the wing has a high end speed ( front foil 1450cm2). Handles feel great: stiff enough and wide enough: didn't feel them in my hand after 3hours on the sea. Leading edge tube is smaller in diameter than several other wings, still the frame and canopy are very stiff allow to pump easily and get up to speed without too much effort: rather efficient wing for pumping. Happy wing foiler.