On section 8-9, release starts at the point of release trigger and continues until impact.
This sounds like it is before impact.
The confusing thing is that Martin Hall in
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quotes Jack Nicklaus who said the release is when the distance between the left shoulder and the clubhead is at its longest - and he demonstrates this in the followthru. It seems that Homer Kelley and Jack Nicklaus - according to Martin Hall - differ in their opinion in this matter . How can that be?