Pete,
Simon just called me a muppet, which I took in jest. But if I am a Muppet, is the person who taught me the Muppet Master.
Come on, surely if the wind is really varying, you will sometimes have to reposition it irrelevant of which wing you have. I have a revolution and if the wind is say up to 45 degrees off I can get the wing up and turn into it, but any more than that and I would wait or move it.
Jon