I am probably the person that catman speaks of.

Light?....yes, very. Costly?...like anything else in life, that is a personal matter. Class legal? I am sailing a P19 platform with Tornado spin/spin pole/snuffer. Nothing class legal about my boat. The sails were custom built to be as close to Tornado sails as possible; given our mast height differences. Heck, they used carbon sails to race around the world. That should say something about how they hold up.

Dave