naji, I understood what you were saying - no need for Hunger Strike's 2011 post to clarify (but thanks anyway for going to the trouble of finding it). I think you must still misunderstand what I've been saying:
We know where we're going to hit the cue ball by where our set up and practice strokes show us we'll hit. This is true whether our shaft has a pro taper or a conical taper, whether we take no practice strokes or many, and whether our practice strokes stop near or far from the cue ball. We know this is true because we must do it and it's the only way we have to do it.
So if we hit the cue ball somewhere else it's not because the shaft's taper put the tip one place on our practice stroke(s) and someplace else on the shot stroke - it's the same shaft both times, after all. It's because our stroke varied.
pj
chgo