90/90 pivot

[Straightpool_99]

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[Jaden]

I don't know anything about CTE or 90/90...

The other day I made the statement that it does not matter what your bridge length is when pivoting for 90/90. I believe the same holds true for CTE, but your initial alignment is different for CTE.

There was controversy over my statement, with some claiming that it does matter, and some going to some trouble to explain why it matters. I was asked to review my findings, and explain it better if I found my findings to be correct.

I have done that, and found that both "sides"are correct. Pivot length CAN matter. But, only when one is not aligned properly for the system to start with. When properly aligned, bridge length does not matter. Below is a new video I put up which I hope explains it better.

https://www.youtube.com/watch?v=Gkm9WE8HMoE&feature=youtu.be

I don't know anything about CTE or 90/90(but I am an adherent to systems and believe in their merits)...however, the information in this video is straight up Bullshit...

I don't care how you're standing or where your vision center is. If you place your bridge on the same line and pivot from different lengths you are NOT going to end up aiming at the same point...PERIOD...that is the most simple of geometry.

If you ARE ending up at the same point doing that, you are adjusting manually somehow...and that isn't even up for debate.

Jaden

p.s. ok when thinking about this more I MAY know what you are doing. If you are standing in the center CB to center OB line then your perception of the edge of the ball will be different. If you are placing your bridge on that perceived line(but you would have to be placing the cue on a different line for different bridge lengths), THEN there may be some merit to it(the aiming system, not the feasibility of pivoting from different points on the same line and aiming at the same spot). I'll have to look at this with more depth...