I did just a bit more than that. Closing the stance like that definitely helps change the swing path to more in to out. I've seen some good results with that for guys who slice their drivers.
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This is pretty close to to my current swing. My right foot is slightly flared, but my left foot is flared more to be able to turn through the ball at impact. The only difference is I’m working on closing the face on the follow through more than what I’m doing here. I probably could move my right foot back and close my stance a little to get more turn. With the left foot flared that still may limit my backswing some though. My goal this winter is to maintain or increase my swing speed. Another 5 mph would be great.