Does anyone have a recommendation for a teacher or a course that approaches singing in the same way that Windworks does, i.e. minimal effort, use of no more than the appropriate tension in the right places, pitch comes from shape change, volume comes from active exhalation, etc.?
Probably too late, and maybe not what you’re after, but have a look at http://www.oxfordsinginglessons.co.uk. There’s a page there about breathing, and when I read it, it struck me that the author was using the same analytical approach as Greg, but for singing.