You pretty much have to elevate at least a little, just to avoid miscuing - the miscue limit on the CB is only 1/4" or so above the cushion nose, below the tops of most rails.
Which, of course, is why these shots are challenging - offcenter hits create more swerve.
pj
chgo
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Patrick is right on the money here...especially for the players with their fingertips on the edge of the rail. If you fail to elevate to the angle of the cushion, you can easily miscue. Holding the cue tighter may work for some players, but more will be successful using a very light cradle, and a smooth transition. Having a finish point in your stroke delivery (grip hand to armpit/chest) makes it so much easier to just swing the cue through the CB. Your tip always goes to the same place at the end of your stroke (near or on the cloth)...unless it's UP IN THE AIR...which is always wrong under any circumstance. If your tip is finishing up in the air, you're in trouble, and inconsistency is likely.
As far as CB/OB last...there are always four times we should be looking at the CB at the moment of impact. They are the break, a kick, a jump, and a masse'. We have been teaching this for 30 years. Playing the CB on the rail is NOT one of the times where there is a necessity, nor an advantage to looking at the CB last. The cue follows your eyes. The brain, via the eyes, trains the arm to move the cue, presumably in a straight line through the CB. Personal Eye Patterns are one of most effective methods of training your process...once the process is defined and established. Few pro players really know what they do, but many have been video-recorded and observed eyes fluttering back and forth...again, it's the consistency of what we do, as much as how we do it. Even JC's "sync-ing" of his eyes to his stroke have to have some kind of change in there for the cuestick and the eyes...and there will be some kind of pause, deliberate or not!
Full backswing, shorter backswing...it doesn't matter. The stroke is always initiated, timed, and delivered the same way. That one of the reasons why SPF works so well for players to train themselves into a better stroke. It's not about training yourself to be a robot. It's about learning how to self correct on the fly, so you always play at a higher, more consistent level. You make an error...evaluate the cause...and correct it the next time you get down on the table.
Open bridge, closed bridge shouldn't matter...it's a personal choice for each of us. Better players will be comfortable using either bridge when the CB is either frozen to the cushion, or within a ball's width. You still have to elevate the cue to the angle of the bevel on the rail. For those that talk about "eliminating pauses"...that's ridiculous. If you start with your tip almost up against the CB and shove it forward it will be a foul. If you start with your tip an inch away, and stroke through the CB, you still had to pull it back an inch somehow. If you start a couple of inches, or more, away from the CB, and stop the tip at the CB as you hit it, that's just a poke and difficult to vary speed control.
The point I am making is that all strokes contain pauses of varying degrees and lengths of time. You cannot defeat physics. You can't move the cue backwards, from a stopped position at the CB, and change to a smooth accelerated forward stroke without some kind of pause in between...even if it is very short (mine is 0.2 seconds...but it is a seamless transition). Allison Fisher's pauses are about 1 second each. Buddy Hall's pause on his backswing is often 2-3 full seconds! When you really think about it we all pause 3 times...first at the CB, before we pull the trigger...second, at the end of the backswing...short or long...abrupt or smooth. You have to stop the cue momentarily to change direction. How you make that transition smoothly and accurately is the hard part...especially without grabbing the cue tightly, or stopping abruptly and jerking the cue forward.
The third stop is at the end of the stroke delivery process...whether it is a measurable consistent finish (mine is tip on the cloth 6.5" past the far edge of the CB. It is my natural finish for most shots.); a stroke delivery of varying lengths of follow-through; a violent stab through the CB, with the tip in the air reaching for the other end of the table; or any other kind of imagined way of hitting the CB...none of them work consistently without great timing. The most important element of that timing is striking the CB accurately at all cue speeds (we teach 10...most players have only 3). How you make that momentary change from backwards to forwards holds all the secrets to learning to play better more consistently. Holding the cue tightly, putting downward pressure on the shaft, or putting some device over the shaft to weight it down...are all poor advice. I can't stress this enough...until you have an accurate, repeatable set up and delivery process (which is physical, psychological and mental), and have trained it into a habit...aiming will still be hit or miss.
Scott Lee
2019 PBIA Instructor of the Year