I don't think we are on the same page when we say "unique visuals". A set of aiming lines and a left/right sweep is not a unique visual. I think sometimes terms are used interchangeably when referencing a fixed CCB and when referencing a set of aiming lines and sweep, causing some confusion (?)
Every CB/OB/Pocket relationship has a unique visual, or unique fixed CCB. (Move your head a fraction of a hair left/right, you have a new visual, new fixed CCB.) For each and every visual, two aiming lines are used along with a left/right sweep to find center pocket. I'll say it another way: Two aiming lines with a sweep can be applied to a wide range of fixed CCB visuals. That said,
a specific set of aiming lines and left/right sweep covers a range of shots, not one angle. A specific example:
We are shooting both balls into the upper-left corner pocket. One is pretty much straight-in, one is a slight cut to the right. Both of these shots use the same aiming lines: CTEL/C with LEFT sweep. Two different angles, yet the same procedure on both shots takes you to the center of the pocket. That is because each of these two shots has a unique visual, and therefore a unique fixed CCB. The same procedure also works for the infinite possible range of shots between the 3 and 5 ball positions.
So when I say
"Move the CB/OB a hair and you have a different visual, different fixed CCB" I don't mean you have a new unique set of aiming lines. It could be the same aiming lines, or a different set of aiming lines. It depends on the visual.
I hope I'm getting this all right Stan, step in and correct me if I screw up some terminology!