Is there any reason why you wouldnt consider Cuben, or CarbonX? I have been running a CarbonX Smyth Main on my F31R and It has been great, The jib however has shown more wear after 3 years of racing the mylar has proven to be the weak link, mostly because the jib is a 110 Blade jib, and rubs the spreaders when tacking. However the Main has no signs of wear!