[Martee]

Martee,
I have always been somewhat leery of using flashlights. Conceivably, you can make a flashlight shine at a line thru 180 degrees, right? Doesn't seem right to me...

Joe Daniels had a flashlight device (light on each end that you gripped so you aligned it through PP#3 and the sweet spot. It worked rather well I thought.

Seen the same with lasers as well.

The concept of using the flashlights(lasers) as I understand it is to allow for alignment of the sweet spot. Now I have seen people use it for shaft alignment.

The Plane Board Kelley used was the shaft plane. I have had great difficulty in reconciling the use of the plane board in TGM and Chapter 2 along with its references. The answer is another topic in itself, I think.

The one advantage of the Full Plane Board is that you will feel a golf stroke that is probably unknown to most golfers. That in itself may be worth the effort, to gain an appreciation for that feel of the shiftless golf stroke, the location of the hands at the Top and at the End. Also seeing the alignments of the left palm flat to the plane, for swingers earlier than for hitters, the follow through to finish that the club is again on the same plane and the right hand flat to the plane, the flat left wrists, etc. A lot of Look Look Look can be had without doing an manipulation to achieve these alignments.