A good on course group of alignment aids that are legal is the golfer, his grip, his stance, a verticle line and the club face. By that I mean take your club, with your normal grip, and normal stance. Find a verticle line such as a post/pole, corner of a building, or anything that sticks straight up. Hold your club with your arms out stretched, and align the scoring lines on your club face with that verticle object. Your club face will be square in relation to your grip, and your stance. Now, the problem is when you put the club down to address the ball, your club face in most instances will look closed. It is still square to your target line, but because it looks closed, many golfers will rotate the club face open to what looks square at address, and then wonder why the ball flight went right (for a right handed golfer) After looking at what appears to be a closed club face for a while you get use to the closed look, and will trust it. GJS