... And... as I said if one's stroke varies enough that it would cross over center while intending to hit on one side of center then they should be doing nothing but working on their stroke.
On his recent DVD, CJ put a number to his TOI -- 1/8th of a tip (and by "tip" I imagine he meant the full cue tip width rather than just the (smaller) tip contact patch). Since most tips are about 1/2" in width, 1/8th of that is just 1/16". Do you believe that most good players' strokes are always accurate within 1/16"?
With the TOI plan of operation one can mis to either side & still poket the ball. Can that be done with a planed center hit? It might happen with BHE at the proper bridge length matching the pivot point of the cue provided the speed is correct as well. But for that to happen other than by pure luck, one would have to plan to shoot the shot with only the correct speed to account for a mis hit. ...
I've been wondering when BHE would be brought into the discussion. For a good many shots, if one bridges at the shaft's natural pivot point and then strokes crooked -- unintended back-hand english -- the CB still tracks on the intended line of the shot. So if the initial aim was sound, the ball still goes in. Your comment about speed of shot does have some validity in this, however. So does CB/OB separation.
But, now, compare the difficulty of sending the CB on its intended path in the manner just described (bridging at the pivot point and planning to hit center CB) versus using a TOI at varying CB/OB separations. For example, let's assume the two balls are 2 feet apart and we are cutting the OB to the right. Further assume that we need to squirt the CB some small amount over that 2-foot distance, let's say 3/32", to pocket the OB center pocket using TOI. Assume we do that perfectly.
Now move the CB back 2 more feet, but on the same line to the full-hit-ghost-ball position as for our shorter shot. Now we need to squirt the CB 3/32" over the 4-foot distance. Will the same CB hit (contact point, cue stick angle, shot speed) do that? Won't the CB deflect a lot more over 4 feet than it did over 2 feet? Do we have to worry about swerve yet? Do we now need to squerve it 3/32"?
Now move the CB back 2 more feet on that same line. Now we need to move the CB 3/32" to the left over a 6-foot distance. Surely swerve is coming into play by now. Will the same hit on the CB work?
To use the TOI/3-part pocket system do we have to become cueing savants to get the net effect of squirt and swerve to put the CB in the right position at all the possible different distances between CB and OB? Can simply angling the cue a fixed, small amount (rather than holding it as level as possible) accomplish that?
Does TOI really simplify life? I see it as potentially highly beneficial for its effects on the CB after collision, if one prefers to play position in that manner, but I'm not yet sold on its other claimed benefits. I look forward to hearing more in CJ's TOI video.