Depending on - impact fix alignments/grip type/axis tilt/ball position/desired result - impact at station 7 would provide more clubHEAD margin for error and more support for impact, especially for iron play. In short, how you position a machine using a particular pattern for a given result vs the total motion of that machine.
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Simplicity buffs, see 5-0, 1-L, 2-0 A and B 10-2-B, 4-D, 6B-1D, 6-B-3-0-1, 6-C-1, 6-E-2
Depending on - impact fix alignments/grip type/axis tilt/ball position/desired result - impact at station 7 would provide more clubHEAD margin for error and more support for impact, especially for iron play. In short, how you position a machine using a particular pattern for a given result vs the total motion of that machine.
But if Impact were at 7 and the clubface were in line with the wrist and not open . . . you got yourself a Clubface HOOK.
On page 102 Ben Hogan's diagram shows impact at station 6.
In the diagram on page 103 the left hand appears at or close to low point before the clubhead has reached the ball.