Dear bgolfing,
Stand taller with a putter shaft across both shoulders, the butt-end of the putter extending beyond your lead shoulder and resting alongside the vertical plank of a door frame. Move your shoulder frame so that the butt slides down the plank and then back up the plank. The tendency will be for the butt to come off the plank headed back up. Now make the same motion with a rocking back and forth beneath a fixed neck / throat. Move everything simply by rocking only the lead shoulder down and under then back under and up.
When you do this with a putter held in the usual address position, don't bend over so much. As long as the eyes are aiming straight out of the face, you will have no trouble seeing a line straight sideways that matches the line the putter face aims along, and besides, this eye gaze and head posture is really only for aiming, and has little to do with the stroke itself. You can stand taller for the stroke itself, even with a head that is not "flat" to the surface.
The trouble with the takeaway is due to muscles in the forearms, so don't use them. These muscles "flex" the elbows, and this sends the putter over across the target line. Use the lead shoulder to shove thru the lead arm and putter shaft to the sole of the putter beneath the sweetspot, so that the sweetspot sort of "strikes" back like a match-head getting struck on the sandpaper of the green. You can coordinate the hands with this if you want, but be sure the lead shoulder is the main force-source. And as a nicety point, make sure the putter head starts moving back immediately with the start of the shoulder shove, instead of letting the shoulder push for a little before anything happens with the putter head.
Let me know if this helps.
Cheers!
Geoff Mangum
Putting Coach and Theorist
PuttingZone.com
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