[6bmike]

GB, thanks for this post. Well, you can believe or not but even not being a TGMer I knew that those 3 imperatives are keys for good golf.
Flat left wrist/bent right wrist is something we mortals call as a push release.
That's why I never put special attention to the most common crossover release type.
Clubhead lag - well, it depends what kind of lag we are talking about - dorsi flexion right wrist lag (right wrist bent) or radial deviation right wrist lag (right wrist cock). Push release (bent right wrist) favours the first one, unless someone is so gifted to transfer the wrist cocking lag in the first part of the DS into the wrist bent lag in the middle of the DS. If a golfer cannot transfer it soon enough he is left with a crossover release type. This is how I understand lag in my plain language.
Srtraight plane line - yes, this is the ideal we all should go for.

Cheers

I think you have a wrong 'notion' on a few things.

A Flat Level left Wrist with a Bent Level Right Wrist at impact is NOT a push release or any release at all. It is an alignment at impact. It is what Homer Kelley constructed as the Flying Wedges. There is no push or cross over release in the TGM. A straightening right arm can drive the Bent Level Right Wrist or the Left Arm can swing the same right wrist condition. The right wrist does not push- that is a throw-away.
What you call a cross over release is a Swivel of the Left hand after impact which still had the First Imperative.
Clubhead Lag- one of THREE types of Lag discribed by Homer Kelley- is the hands leading the clubhead. The clubhead is resisting the Drag and Thrust of the Hands. This is not the Left wrist cock angle. It is the pull or push of the shaft dragging the clubhead. You were referring to Accumulator Lag, the angle of the cocked Left Wrist that needs to be released and roll into impact.

I know this is a bunch of words but they are very simply alignments.

good luck