mastery may not be possible, however, it's what we all should strive for!
When we all talk here about "aiming systems" aren't we just really talking about how to make shots most consistently. That being the case, there are two aspects then to consistency, one is physical and one is mental.
From the mental side- CJ said" to get down of every shot as if it were already made"- and that is it- extreme confidence, commitment to the shot, and no negative thoughts- best way to achieve this for ANY shot is to look at every shot as being the same in terms of difficulty- I use the mindset that every shot just requires a different contact point on the object ball- nothing else enters my mind- so every shot is different- but no shot is more difficult - eliminates all negativity about the shot, builds confidence and commitment.
As for the physical part of every shot- I honestly just think that each individual, with good shooting fundamentals developed, needs to practice the hell out of the game until they find what works most consistently for them. Shotmaking is NOT just the aim anyhow, because, like all sports, you have to possess the rhythm and timing that ALLOWS you to deliver the cue ball to the desired spot on the object ball most consistently.
I doubt there is any "system" that can put together how to deliver the cue ball to the object ball at the correct contact point, at the exact moment that contact point is "seen" in a shooter's mind's eye, resulting in a perfectly timed release of the cue stick; and then repeated over and over again because the perfect shot rhythm has been developed.
All of THAT, is what the very best pros do MOST consistently; some of it is just how they are wired, the rest is self discovery through hours and hours at the table - only the very basics can be found in a book or video.
Timing and rhythm are SO important to the shotmaking process and you just cannot teach a "system " for that, you can make someone AWARE of what they are and how necessary it is to fully develop both aspects ; but every person has to self discover their own unique timing mechanism and rhythm to incorporate into their pre and over the shot routine.
That's right, when it comes down to the root of shotmaking it's confidence. The question is how do we develop this confidence if we don't already have it?
I traveled all over the world and played every gambler and/or top professional player and not once did I get warned "don't play (name) because he's got a superior aiming system".
When I was with Omaha John, one of the greatest gamblers in the country he told me a couple off things that helped:
1) Use Kentucky Windage, if you're over-cutting balls, aim thinner and if you're under-cutting balls aim thicker.
2) Make the cueball "float" to it's next position after contacts.....make it appear it's on a string....(this is done by taking the after-contact-spin off the cueball by cuing it slightly to the inside of center.
From my experience of playing different players and listening to their opinions is they think the aiming is done AT the object ball, rather than AT the cue ball. The cue ball is the only thing you physically contact so it's actually your aiming target.
The object ball is used to ALIGN and connect the shot together so you can accurately create the angle every time. This is done from the foundation (feet) UP, like building any other structure of building.
I changed my stance the same tournament I went pro in Toronto Canada because I knew if I was going to beat players like Efren Reyes, Earl Strickland, Johnny Archer, Mike Sigel, Buddy Hall and Nick Varner I'd HAVE to be as consistent as they were. This means my physical structure HAD to be like theirs and mine wasn't.
After I learned how to "clear my hips" and position my feet like the champions my consistency went up and I played 15 professional tournaments in a row and never finished less than 9th......two runner ups and several thirds, fourths, and fifths in tournaments filled with the greatest players in the world.
So learn how to align to the shot the same EVERY time, then learn how to point your tip at the object ball to create the angle. If you want any help learning these things I'd be glad to help you either by answering your questions or I have videos that show all these things in a step by step routine that anyone can do with practice and the willingness to master the game......mastery may not be possible, however, it's what we all should strive for!