This sounds crazy but it is not a joke. When my shadow is behind me my swing feels long and smooth with no club head manipulation. And as I start turning and my shadow starts getting in front, my swing is so different. The best way I can describe it is short armed and the club head feels like it shuts in my back swing. If the shadow is behind me, I can hit 300 yard drives right down the middle with a little draw. Shadow in front, I've been known to miss the ball completely but typically its a 250 yard slice. Sunglasses do not help. Nothing I have tried helps. I have tried concentrating on the ball, pretty much everything. I don't get it and cannot really pinpoint when it started happening. I'm about to sell my clubs.