well each tick as Stan calls it is actually at each 1 degree increment so radially 0.019635" about the circumference of the ball, so I don't know what you showing 100 lines across the center of a flat circle represents. If it's your stick man representation of a cue ball it should at least show 180 lines. But the problem is, Stan doesn't say you turn your head X amount, he says you cannot see the no imagination shot line with your vision center directly on the sight line. How many ticks work for you is irrelevent as long as you can repeat it. It may not even be the same for inside gearing as opposed to outside gearing,,,,,, nobody is trying to move their eyes 0.019635". But for heavens sake, do not under any circumstance actually try any of this stuff,,,,,,,,,, whatever would you bitch about if you realized it actually does work.With your eyes 30 inches from the CB, to shift your gaze from the CB's center to its edge you pivot your head/eyes less than 1/4" to the side. A line from that slightly different vantage point to the CB's center of mass (its "3D center") passes through the CB's surface less than 1/100" from the original visual center (more like 1/150"). This is easily shown geometrically.
Even if you could make the small head/eye movements accurately enough (doubtful), you couldn't see that small an increment on the CB from that distance, much less do something useful with it.
pj
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