>>The sail on Johnny and Charlie's boat is Cuben fiber, so it is going to hold its shape differently (so I have been told - you guys might help me on this one.) I hear it is very light weight. Their spin is also very light weight, a couple of pounds less.

Please correct if I misunderstood but are you saying their spinnaker sail is a couple of pounds lighter than standard ?

I know for certain that the 1st spinnaker I bought (1999) was made of the most basic, heavy duty and low costs spi nylon that was available and that it weighted in at 1222 grams (electronically measured at the groceries) = 2.7 lbs. (source : ) I would love to safe even 1 lbs on that. It was 17.5 sq,mtr. but still the cloth itself is not the heavy part, the reinforcements and eyes at the corners are.

What kind of cloth were they using ?

Wouter