The Spit is One Design. The only F16s we have seen here are Stealths and each one has been different - so they do not hold their value. The As are fanatical over here - so no converting The heavier crews are on the F18s and Hurricane 5.9s and the lighter crews are sailing Spitfires. Those not hugely into racing are on Dart 16s and the new Topper cats http://www.catamaran.ie/cats/index.html