Dear Jack,
The Zen Oracle concept is based upon fine down-the-line dynamics. I personally don't like the focus on that specific part of the stroke -- too late. I also don't like the restriction the design imposes on the backstroke -- can't go too far back or the ball will come loose backwards.
I also show up "slow" according to the folks who think they have a good bead on what is good or bad (they don't). my backstroke is 1000 ms or thereabouts, whereas most "average" golfers are around 700-800 ms.
I think the quickest way is to forget about hitting the ball or making sure you "get" the ball to the hole, and instead work first on the stroke itself, coordinating the shoulder with the dropping under of the putter and the arms and hands as a unit. You might try letting the stroke drop from the top of the backstroke against your left foot's instep, with the foot stretched out in the way of the stroke. Doing this, watch that strokes of all sizes reach the foot in the same total amount of time coming down to impact. So long as the downstroke time is always the same (about 1/2 second), then you are neither speeding up gravity or slowing it down.
After you get a strong sense of how long gravity actually takes to deliver the putter head against your foot, then you have to be able to verbalize this timing in the way you pace your tempo phrase ("one potato" backstroke and "... two" down to impact). Then you watch both timings -- backstroke and downstroke -- independently to make sure you don't speed up or slow down the timing. The backstroke always takes one full second or so (your way of phrasing "one potato"), and then the downstroke takes 1/2 second or thereabouts (your phrasing of "... two"). The ball impact always "clicks" right smack on the two. Never hurry, never worry.
When you get this timing down, AND you don't worry about whether the ball makes it all the way to the hole, then you are in a good initial position to "grow" a bigger backstroke. When short, the cure is "bigger not faster". So if you are short to begin with, that is great. Just take your time with the backstroke until the size and the timing start to reach the hole. This way, you won't revert to hurrying at the back of the ball with a "hit" to "get" the ball to the hole.
You'll never get smooth with gravity until you start leaving the full distance to the backstroke only, and never even "do" the downstroke.
I have studied some of David lee's notions about putting and the full swing, and I like his "toss" back of the stroke. Other than that, I believe my ideas are much more deeply developed and fleshed out in detail, grounded in science, and articulated. But that's just my personal opinion about my work.
Cheers!
Geoff Mangum's PuttingZone.com
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