OK folks, here goes.
Against my better judgment, I'm posting something that might just help someone improve their potting of balls. I hope they don't use it to beat me!
I watched those videos of Ron V on Youtube as posted above.
What I found after a few hours experimenting, and another three hours playing 9 ball was this.
Starting with the 90/90 position, play around with using the 90/90 for shots that are in the under 15 degree range, and then pivot to center ball and roll the cue ball with a touch of follow and see what you get. For shots in the 30 degree range, line up as for a 90/90 shot, and pivot your cue stick through the point on the cue ball across the object ball and divide it into six equal sections. Then aim the cue stick through the 90 point on the cue ball towards the 2nd of the six points on the top of the object ball, make a bridge about 10 to 12 inches or so, pivot the cue using the your bridge point to the center of the cue ball, and stroke it smoothly, and roll it with a touch of follow and see where the object ball goes. You may find that you need to adjust the length of your bridge, but if it's in the 10 to 12 inch range, you probably won't need much adjustment. For shots in the 45 degree range, do as in the second example above, but point the tip of your cue through the 90 on the cue ball and aim at the top of the center, or point 3 of the 6, then pivot your cue about your bridge to center ball and stroke the cue ball as in the other examples. Do the same for the 60 and 75 degree shots.
How do you tell what the angle is, approximately, without a protractor? Here's what I do, and it works alright for me. From the angle of the cue when at 90/90 to each of the intermediary points on the way to 75 degrees, you will find if you place your cue along those lines that the distance between the points is approximately 12 or 15 inches or so, whatever the distance for your cue is from 0 at 90/90 up to the 75 being 5, divide the angles angles by the distance between the butts at the bumper. Experiment with this a bit, and you'll soon be able to estimate what the angle is, and then make your primary aim line and then the pivot line to center.
Believe me, this thing works.
For me at least; hope it does for you.
As with anything else, if you want to shoot with english, you'll need to make adjustments for squirt and swerve and throw and so on. In the meantime, start to enjoy pool using center ball like you've never done before.
Wow...
Flex
P.S. Sorry if my explanation doesn't make any sense to you. Perhaps it needs to be shown on the table to "get it."