I've put this under humour, but... 
...would there be any benefit to attaching tassles to the end of battens? Could they be used as trim guides, indicating turbulence or lack of? What colours would look the prettiest?
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They would have to be made out of carbon nano tubes for windsurfing.
A. It's carbon, so it markets well
B. they won't stick to the sail when they get wet
C. You wont be able to see then since their "nano"
My 8 y/o daughter has just taken her pink and fluoro plastic tassles off her bike handle bars (peer group pressure) - I'm sure she wouldn't mind you using these :))
