Dear Jeffrey,
I personally don't recommend LHL because of the tilting of the lead shoulder, which tends to deloft the putter and alter the bottom of the stroke arc with hands ahead somewhat. Instead, I recommend getting the benefit of "lead hand" without the "low" by giving the smooth action of drawing a line with the putter to the lead hand and simply keep the rear hand out of any action. To me, the stroke is a "falling straight online" of the lead arm, really rather than the hand itself, combined with rocking the shoulderframe at a matching pace. This way, there is no difference between the pace of the hand, arm, and shoulders, or for that matter the putter itself. It is a unified flowing action. The shoulder rock has some work to do just past impact, though, to lift the arm and continue the whole "triangle" evenly and smoothly into the follow-through. Else, the stroke tends to stall out and perhaps pull inside.
I was just summarizing the logic of Pelz's data for the target population of so-so amateurs. These golfers would probably benefit by LHL until they got a lot better.
Fot you and advanced putters, I would stress sticking with a straight stroke, period. Whatever sends the ball rolling smoothly straight out of your setup is what you want. Then, once the read is done and the putterface aimed, you setup to the putterface and you should be golden.
Cheers!
Geoff Mangum
The PuttingZone.com
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