I use three different swings when I play and practice. A centifugal swing to 90 degrees, an arms swing, and an upright shoulder swing. Each one produces a straight shot. I find that with all the swings I have to keeps my head well behind my chin. I whould say about 6 to 8 inches. If my head get any closer to my left shoulder I pull left or block the shot right. Where does my head really belong?