I took your advice and played the 5 shots, more so the 1 and 5 shots, as they contrast so much, to see if I could get a feel for the CTE and ETA visual you guys are experiencing.
I gave up on placing the ghost ball pretty quick, as I couldn't get a feel for the Edge and A locations. So what I did was look for a slight undercut line, approx 1/2 tip inside sweep rotation from what I perceived to be the pocketing line.
Certainly the lines don't line up in any way, but with practice, they can act like a guide to establishing a direction for the CB from which to make the small sweep.
I found I needed to focus on the OB with CB below in my peripheral vision when sensing the initial direction to take to the CB. Toward the end of the inside sweep, I'd shift my vision to the OB again for fine tuning, which assisted me in when to stop the rotation.
With some practice, I can shoot pretty close even without looking back to the OB during the sweep. With the fine tuning, it works as well as any other method I use to aim if I take my time on a shot and stare at it hard.
While what I'm doing may be different to what others experience, I see strength in how using the lines as guides and staring so hard at the balls going into the stance, gets the shooter into a very good position from which to fine tune with a natural feeling sweep and the eyes are being trained very well in awareness of the CB and OB edges.
I would say that the CTE line dominated my perception and the ETA line was more like a second check guide that provided a bit of visual data on the surfaces / edges / relative positions of the balls... kinda like adding a touch of 3D to the perception.
Colin