Hi David, I'm sorry you didn't like my talk but there's absolutely no need to get personal about it. Whilst I concede that I 'don't know everything', there are many aspects of our sport that will always remain open to discussion or interpretation. People sail boats in different ways and although there are many general guidelines that will benefit most people, the fact is that what works for 'one' doesn't necessarily work for 'all'. For your information I have raced sailboats at a decent level for over 40 years during which time I have won 10 National titles, 2 Europeans and placed top 5 in several World's. I say that not to brag but merely to illustrate the fact that I feel that I am reasonably qualified to talk about sails. We're all entitled to opinions however and if you don't like mine that's fine, tell me specifically what you disagree with and I'll be happy to answer with an explanation. If I've got something clearly wrong then I'll be happy to learn from your expertise but please keep your personal views to yourself.