regarding the open clubface business, tell ben hogan that...
some footage of the late ben hogan making practice swings with clubface way more open than actual swing...because he likes to, and can, square the clubface during release when he wants to...
so the point I'm trying to make is, why can Ben Hogan square the clubface from an open position but most slicers can't? Yes, of course, you can start the clubface off from a relatively closed position so there's less squaring needed. But why don't you just teach them how to square it in the first place...
Sorry, not a very clear post as I need to run...will clarify later if needed.