I have never thought of moving it off the elbow plane to adjust to the players chosen backswing plane or downswing plane. Makes perfect sense.
Sorry for thread jacking but while we are talking planes:
The Butch Harmon laser trainers have one light pointing out the grip end and another one pointing from approximately the #3 to the sweet spot (coincidence rather than TGM compliance probably). With constant back and forth swinging you can get the two ends to trace a straightish line from horizon to horizon along the target line , albeit with some wobbling as the sweet spot laser rotates off the inclined plane to the sweet spot plane.
Do you know of another or maybe better way of practicing plane compliance? If so please share it. I have the Harmon lasers and find them to be very helpful although my neighbours must be wondering what the heck is going on in the dark of my living room. They can shine out the windows and on to trees etc.
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