"Lag" is created by a full shoulder and hip turn with very loose arm muscles and grip. When the club is swung to the top, its momentum carries it into a deep wrist cock.
Then IF your downswing starts with hips turning back which then pulls the shoulders which leave the arms behind and finally pulls the arms around and allows the club to flail-- the lag is actually increased during the downswing and released automatically. Sergio is a great example.
I strongly suggest you get Bobby Jones tape "Breaking 90" and watch carefully.
Larry
Per Yoda, a G.S.E.M. - "The trailing of the Club behind the Hands is not Clubhead Lag."
The left wrist being in a cocked attitude does not constitute clubhead lag. That consitutes accumulator lag, as Acc. 2 is being loaded and stored.
Also from Yoda - "The Clubhead Lag is indeed the very slight flex in the Shaft that occurs when the Lag (the resistance of the Sweet Spot inertia to a change in its direction) is Loaded (7-19) -- I like to use the term welded -- against the first joint of the Right Forefinger (#3 Pressure Point) during the Start-Down."
So lag may be increased during the downstroke - but not by your reasoning. It is not when you further load Acc. 2, it is when the clubshaft resists the change of direction from the Top or End positions and flexs accordingly.
You nailed it Robot Buddy R2D2! I feel like a proud parent at the graduation ceremony!
And don't forget everybody, unlike Accumulator #2 (the Wristcock 6-B-2-0) which is loaded and released per the [Yoda bolded and enlarged] quote above, the Clubhead Lag has no release point (6-C-2-A).