Hi I have a Nacra 5.0 and am wanting new sails. I was really impressed with the sails that whirlwind has to offer but for some reason they do not make 5.0 sails. My question is does any one know of a company that makes square head sails for Nacra 5.0. Also i was wondering if the new 500 sails would work on a 5.0 and if they are available for purchase? Any input is appreciated.