Do you think the term "plane shift" is apt when what most /all people do ( including Leadbetter - hence your X classification) is a "plane drift"?
Plane angle can readily be defined at 4 points in all swings.
1. Address
2. Left arm horizontal to ground
3. Top/end of backstroke
4. Impact
plus maybe Follow through/ both arms straight.
Most golfers ( I would argue all golfers) drift planes between these positions. During drift the butt/end of club rarely points at target line unless the drift happens rapidly around clubshaft horizontal ( and therefore ideally parallel to plane line).
Leadbetter people basically are double shifters - categorised by their address / impact location and top/end of backstroke positions. They may drift a bit more than others off TGM plane at left arm horizontal but 90 % of people drift not shift!
The plane angle may shift but the plane line never changes. The plane angle shifts by rotating around the impact point plane line like a pivot point.
Because the club is always on this plane, one end points at the line or is parallel to it, it is the whole entire club maintaining a straight line relationship to the plane line. Even when the plane shifts because the plane rotates around the impact point plane line, you are still either pointing to the plane line or are parallel. Going from one plane angle to another does not mean you go offplane as you travel between them.
Now, maybe I don't appreciate the genious of Leadbetter, but to me his procedure as described and depicted is basically offplane on both the backstroke and downstroke. There can be no downplane force directly towards the plane line, on a plane, any plane, when he believes what he does esp in the downstroke with his parallel lines (club pointing outwards beyond the plane line). He basically tries to get golfers to get the clubhead traveling in a big warped circle....although the good golfers he teaches don't do this....
That is why I listed as X classification with the nearest geometrically correct variation being double shift....
How many "TGM shifters" truly have their tip/butt ends really pointing at a single plane line during the shift?
Unless it happens near instantaneously around club horizontal to the ground/parallel to plane line then a shift is almost always off plane until it re-establishes a pointing-at-the-plane-line position.
That is what I mean by drift - a gradual off plane movement which is needed to re-establish on plane shaft/sweetspot plane after a shift.
How many "TGM shifters" truly have their tip/butt ends really pointing at a single plane line during the shift?
Well strictly speaking none of them because the butt end of the club doesn't exactly point at the plane line unless the sweetspot has rotated and thereby putting the shaft onplane as well as the longitudinal center of gravity.
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Unless it happens near instantaneously around club horizontal to the ground/parallel to plane line then a shift is almost always off plane until it re-establishes a pointing-at-the-plane-line position.
These are not the precision alignments of the golfing machine. It is merely offplane. Whilst you can get away with being offplane in the backstroke, find an alternate downstroke plane or readjust at the top back to where you should be, this is not the prefered way. On the downstroke you must be in a position to drive the clubhead to a point on the plane line. Even with a plane shift, the force goes downplane towards the line on a plane and is one of the three essentials..
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That is what I mean by drift - a gradual off plane movement which is needed to re-establish on plane shaft/sweetspot plane after a shift.
Or you could do it the proper way and shift and be onplane whilst your preforming the shift at the same time. The plane line does not change, the plane angle is adjustable....otherwise the clubhead orbit becomes 3 dimensional and the precision vanishes.
, but to me his procedure as described and depicted is basically offplane on both the backstroke and downstroke. There can be no downplane force directly towards the plane line, on a plane, any plane, when he believes what he does esp in the downstroke with his parallel lines (club pointing outwards beyond the plane line). He basically tries to get golfers to get the clubhead traveling in a big warped circle....although the good golfers he teaches don't do this....
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