We've got a 28 foot cruiser racer masthead rig where the class only allows dacron mains. Our current main is 10 years old and is ok >15kts but draft aft in light hurts. Sailmaker suggested radial instead of cross cut but I'm a bit sceptical as all one designs ie J24, Etchell etc still cross cut. Would it be that one designs change mains every couple of seasons and don't worry about longevity as they replace them anyway? Otherwise why wouldn't everyone use it?