[lagster]

Search for the Perfect Swing claims Kel Nagle is in a perfect in plane position above. The ball, #4 Pressure Point, Left arm, hands, shaft and clubhead appear in a straight line.
The B photo shows the shaft and clubhead well off plane.

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These are nice pictures, however, with any pictures, or video dealing with PLANE, the camera positions(angle and height), must be exactly right, and the LINE must be drawn in the correct place.

Cut a circle in a sheet of plastic stretched onto a rectangular flat surface. Prop it up on the angle of your clubshaft. get inside there. You will start to see what Mr. Kelley is talking about.

You can prop the plane up different angles, and it can still work. Actually, as long as the clubshaft and sweetspot get on the plane angle a little before you get to IMPACT, many variations can work.

You can in theory, stay on one angle the whole time. Most people, however, have some shifting of angles. Jim Furyk, shifts angles very obviously. Tiger Woods, has a less obvious shift.

The Plane is discussed in 10-6 and 10-7 in TGM.