Some of you may recall that a woman named Dori O'Rourke was an NG teacher. I happened to find she has a website, and it has some very interesting and different stuff.
I had to sign up to be able to view her 10 "lessons". They are not about mechanics per se. Mostly they are about getting your mind working for you in your golf game and your practice.
From what she says, she doesn't teach NG any more, or at least not specifically. She says she teaches each student how to get good impact with a swing that suits them personally. Anyway, I thought it was all pretty interesting.
She was one of a small parade of pros & Celebrities through the NG infomercials. Not surprising that she's no longer teaching NG; none of them that I've seen in person or on video was actually SA.