One caveat: Running English was a big mystery to me for a long time.
Oh, sure, easy to define and illustrate on a diagram of a cue ball. But as we all know, using the same exact spot on the cue ball to apply running English might not always get you to the intended target (different cloth, different age of cloth, different tables, etc.)
Sometimes you will be closer to the center, sometimes closer to high ball, sometimes further or closer to the edge.
When I use 30-50-70 system, for instance, I need to use running English in which the contact point is closer to the center and closer to the edge if I am trying to hit 5(50) or 6(60) on the long rail.
But if I am going to 8(80) or 9(90), I am using a high ball with just a half tip or so of running English.
Oh, sure, easy to define and illustrate on a diagram of a cue ball. But as we all know, using the same exact spot on the cue ball to apply running English might not always get you to the intended target (different cloth, different age of cloth, different tables, etc.)
Sometimes you will be closer to the center, sometimes closer to high ball, sometimes further or closer to the edge.
When I use 30-50-70 system, for instance, I need to use running English in which the contact point is closer to the center and closer to the edge if I am trying to hit 5(50) or 6(60) on the long rail.
But if I am going to 8(80) or 9(90), I am using a high ball with just a half tip or so of running English.