Nice shooting. The "range" of shots (from 1st to last) span about a 3 to 4° in cut angle. The 1st shot being very close to 22° and the last around 25 or 26°. As firm as you hit the shots you are surely stunning the ball, producing more CIT in the first shot than in the last. So the first shot is slightly overcut and then the CIT thickens it up. As the shots get thinnner the overcut becomes less (as you say, you are reaching the limit of a 30 inside), but the CIT is also decreasing as the cut angle increases, which means the ob is being thrown less, making it possible to use nearly the same aim for each shot.
In other words, I believe I can shoot each of these shots using stun and a 5/8 fractional hit each time. R
Simply rolling the cb through the ob I'd have to shoot the last shot a touch thinner than the others, or use a half tip of outside spin on the cb. Fractionally, there's only about a 1/16 aiming difference between the 1st shot and the last shot, a very subtle difference that the brain of an experienced player can easily notice automatically.
BC21,
First of all, thank you for a succinct and reasonable response to my video.
As for CIT, here are a couple things. Anytime I'm shooting a shot near 30 degrees (which would be maximum CIT) I try to minimize it if I can. I do this by doing two things. 1) adding some top or bottom spin. I haven't inspected my video closely, but I'm pretty confident that I habitually put a touch of bottom spin on shots like these, given the choice. Watch the CB exit path, you'll see. 2) speed. I don't baby these shots in, I give them a bit of punch. With those two factors in play, the CIT is minimized.
Now as for the difference between these shots, lets pay attention to shots 1 and 4. So they are about 3-4 degrees apart, I'll take your word for it. My main concern would be range of error to cut the ball. If you place two balls inside the pocket you are aiming at, you'll see the width of error you have to work with. If you are using 4.5" pockets, the balls would be touching, meaning your error is 2.125 inches (ball center to ball center). My table is 9', so at 6 or so diamonds away, you have to be pretty damned exact to pocket the ball.
If you setup shots 1 and 4, freeze a ghostball on the contact point of each one, then stand behind the CB and see the thickness of each cut, you will see that the difference between shots 1 and 4 is fairly significant. You *have* to be accurate here to hit that pocket with a ~1 degree margin of error. As I've stated before, I don't do anything post pivot to CCB to change the shot. At that point I'm on the shot line and CCB is my target. I DO look at the OB last. I'm never thinking "oh this needs to be a touch thinner", etc. CTE gives me CCB to pocket the ball. Although each of these shots has a unique physical orientation, I can get there through the same 30 inside perception. Our eyes are the most accurate instrument of our bodies. The perceptions are exacting. They do NOT work like a protractor on 2D paper.