JV,
Not 1/4" (quarter-inch) of english, 1/4 of a tip, a pool convention that is a tiny increment. For a 13mm tip, 1.65 mm (a tip is one half overlap of itself, so a 1/4 tip is 1/8 of a typical 13mm tip, or 1.65mm over to the right with the tip).
Also, I have free space, like most players, in my closed hand loop, to use, so it's not a pure pivot, almost no one purely pivots around a held axis when they say they do. So! As I've written above (and used at the tables) almost imperceptible supination.
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PJ,
It's worth the added variable to do what all BHE players enjoy doing, use less adjustment to score the OB. That's why quite a number of playing pros use BHE. We all know it's fundamentals, not fancy moves, that make the pros great players, so they are even more leery of snake oil and adding variables than you or I. They love BHE.
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All,
I want to teach, not gloat, but it's almost heady to shoot english so easily and watch people with diagonally pivoted cues avoid english at CB-OB distances longer than two diamonds in length. How many books or magazines have you seen that say "avoid english over a distance because of variables"?
I posted a diagram above, where because of the vastly improved angle of approach, you can hold english beautifully, at a variety of shot speeds, over the nine feet of CB travel, score the OB, then have the cue go several rails around the table with spin.
Why? Because the cue is turned slightly diagonally and you're shooting (almost) straight ahead along the shot line.
Finally, the argument against variables sounds like "Don't teach it, because it's harder to do, and less easily learned." Okay, so I have students of all levels from beginner to pro. Do you want to stay intermediates or go to the next level in your game? BHE is a fraction of what you'll need, but I have a current student who is consistently winning matchups with players 100 Fargo points above him... I'm not saying this to be rude or reprove people, but the argument seems moot, for example, open breaks delivered with a lot of force requires adding some variables and some practice, but is for some the most important part of their game.