Been away from the game for a while. I pursued other interests and widened my experience. One activity that I took up was traditional archery. I had some very knowledgable and gracious teachers and friends help me develop my shooting skills. I have managed to win multiple archery tournaments and shoot high in USA archery individual achievement. One thing that helped my archery develop when I did not have the benefit of having sights was understanding my aiming as a shot picture. In other words its the visual frame that I see each time I shoot in very precise detail. I do not ever recall a book or thread here on AZ as addressing aim where a shot picture is learned and maintained. The closest aiming system to this that was shown to me was Gene's aiming system that emphasized dominant eye placement. After several years of studying and practicing archery I have a new understanding of my pool shot aiming. I understand pool aiming as a visual discipline as much as anything else. I am an archery coach now and aiming is the most difficult thing to teach. Its such a personal and in your head kind of thing.