[Yoda]

Clubhead lag is that heaviness you feel through Pressure Point #3 as Club changes direction. The Longitundinal Center of Gravity of the Club (i.e. the Sweetspot), resists that change due to its inertia (i.e. mass). The Sweetspot doesn't want to move, but it has to. This stresses the Clubshaft and produces that heavy feeling which you try to maintain all the way down, never even thinking about releasing this heaviness. This feel may be cultivated by dragging a wet mop from Release to Follow-Through.

The secret is out and jig is up. No need for me to write: I'm goin' fishin'!