This is my favorite thing from buddy hall. His method of clock position . I discovered it years ago when I realized once I started playing nothing but rotation that I wasn’t as good as I thought I was and my position was fine for 8 ball but far to basic for 9 ball which I’ve found a lot of league players to be honestly. I swear I use this system at least once a game. It’s incredibly simple and accurate from a man who played some of the most accurate position in the game.