I was given Hardy's 1 plane 2 plane book for Christmas, and it made sense to me since I tend to have my back shoulder dive towards the ball, and a shallow swing path seems to lessen the consequences of that fault. Since Hardy mentions Hogan in the book, I figured I better go back to the source and reread 5 lessons. I did get some info out of Hardys book, in terms of backswing and swing path, but I probably wont pick up his book for along time. Besides the info in 5 lessons, its helpful to watch old film of Hogan to see his fundamentals applied to a flawless swing... Easily the nicest swing Ive ever seen footage of.