I am not exactly sure what you are referring to with "contact points." The only shot alignment contact points I know of are the cue tip/cue ball or cue ball strike point, and the cue ball/object ball contact point. Generally speaking, we all know what these are. When I speak of a tool/technique, I am alluding to not an actual physical material thing, I am referring to a mental perceptual concept. Thinking about something that probably no one has thought of exactly in the same way before. You speak of "work is better spent referencing these lines." What does this mean? Explain just the simplest example how this is done. It is the how or execution I am asking for. How can you achieve your goal exactly precisely and guarantee you can be assured of this, nearly almost every single time. How do you work at this referencing process exactly?
The blue line is the line of centers.
The red line is the point to point line.
The black lines are the object ball direction line and the actual shot line.
The yellow line is there to show the exact intersection with the base of the ghost ball.
Once you have determined what your shot will be, (minus lines and plus actual balls) this is what you'll be shooting at:
It's a simple and precise reference.
Or you can guesstimate like all the preferred methods.
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