David Tyler wrote:Pourquoi faire simple quand on peut faire compliqué ?

Exactement.

But seriously:

You seem to be advocating flexible battens, preferring them to articulating battens. On "conventional junk rigs, flexible battens were discarded a long time ago, as being liable to bend too much in strong winds, too little in light winds. Have you a solution to this?

Thanks for your interest.

"Yes I have !" : the Lambda sheeting...

I think I should move to a more technical post than "Corribee for sale". I'll try and learn to do so and will come back soon to be more explicit (not really difficult, I'm afraid). 

just wait a little, sorry.

Eric