I have found it to be true that stance does not necessarily effect plane. I tend to swing more inside out from an open stance and more outside in on a closed stance. The opposite of what would be expected. For instance I have found that if I close my driver stance I tend to pull slice the ball while with a square stance I tend to pull hook or draw the ball. If I set up with the closed stance and concentrate on swinging inside out then I can hit more shots right on my target line with a little draw. The problem is mental and something that I have not figured out how to control. LOL it is hard to set up closed on a hole with ob right and swing out towards the ob from the inside trusting my swing to hit the shot that I 'naturally' hit.
What did Moe call it? Swinging with indifference to the outcome or something like that?