So, this objective aiming system depends critically on how comfortable you feel given the location of your body in relation to the shot? I guess that definitely would include me out since I feel quite comfortable using the same position over a fairly wide range of cut angles - a little more sway here, move the elbow in or out there, rock the bridge hand slightly. That may not be the best thing to do for the sake of consistency, but how can one claim any sort of objectivity and universal application when considering the different body types, dimensions, preferred postures, etc. of players? Even if everyone were to perceive the visuals in exactly the same way, there's a substantial list of somatic variables intervening between what one is seeing and where the cue is aimed. That's why I ask, where do you point the cue prior to pivoting? That should have a straightforward answer in any so-called objective system.We don't have to accept it, but you're right, it would be hard to prove or disprove. There's more to aiming than body position.
What more is there? There is a target and there an object that needs to point at that target. In pool you have 2.25" of cue ball to hit to send it towards a target 2.25" wide. The real target of course is a tiny fraction of that 2.25".
If the goal is to pocket the ball then the actual cue positions that allow the ball to be made are extremely limited. And since the body holds the cue and propels it the actual body position to properly strike the ball consistently in a forward motion are also extremely limited. And by extremely I mean probably less than an inch off the optimal line.
Don't beleive me? Set up a simple straight in shot and get in the proper postion to shoot it. Now stand up and move over 1" to the right or left and bend back down to shoot the shot placing the cue stick on the proper shot line. You will find that you are in a postion so uncomfortable that you almost cannot bear to take the shot. You can repeat this for any shot on the table and it will be very clear to you that there really is only one cue and body positon that works for the shot you are facing.
I might add the obvious in that the difference between making most shots and missing them rather badly, depends on only small differences in cueball direction. At 18" of separation, the difference in approach angles between a 20 and 25 degree cut is 0.57 degrees, and 0.53 degrees for a cut of 30 versus 35 degrees. At 36" of separation, the corresponding differences are 0.29 and 0.26 degrees. It requires hardly any effort to shift between them. Having your body in a decent position helps, but the job hardly ends there.
Jim