Share 'Lenticular sails'

Hi guys,  I take it by the lack of response to my last post you lot also think I'm a crank. I've been researching building my own boat and noticed what problems everyone has with sails, or was it because I'm new to this and posted the discussion in news and not here. As a mechanic I know that simple solutions often work the best, as Bertrand has shown Lenticular shaped sails is the way forward, i…