[Martee]

Clampett IMO big thrust regarding the Aiming Point, is to get you to STOP focus on hitting the ball.

Remember the Aiming Point is where you drive the hands too. The hands lead the clubhead. The four inches IMO is where the Low Point of the golf stroke is or should be for max compression and this was done by testing.

From the top of the golf stroke the hands are directed in a straight line to the aiming point. Now this actual Aiming Point can change based on the golfers swing speed and length of golf club used. Though it may seem that Clampett has said 4 inches, this is where the low point is, the Aiming Point may actually differ and thus the reason for the Bunker Drills.

TGM in 6-E-2 states you have to experiment to find your Aiming Point.

TGM doesn't define a Low Point per-se, in TGM states you don't have to take a divot. Clampett also pointed out that divot depth varies by individual, but the deepest point in the Divot, the Low Point, should be 4 inches in front of the ball. Interesting that his ball position places the ball back just about 4 inches from what TGM defines as the Low Point (Left Shoulder/Primary Lever).