[Martee]

Sorry I mistyped in the second reference it was meant to be line of compression as I starte at the beginning of the post. You made it clear that hinging was your focus regarding sustaining the line of compression, that is what I am not sure is correct, maybe key is too strong of a word, but that is essentially all you addressed in your intial post.

BUT you stated

tongzilla wrote...Notice I did I not say anything about "Hinging is the key to sustaining Lag" in any of my posts. I kept the concept of sustaining the Line of Compression independent from the concept of sustaining Clubhead Lag. I would add that these ideas should be kept theoretically and conceptually separate, even though they are inextricably linked in the pratical world.

Here is a fact:
The same compression point cannot be maintained during the Impact Interval when using Angled Hinging (the typical Hitter's Hinge Action). There should be no debate about facts. Ceteris paribus, the ball will not go as far. Alas! Everything is not equal!

Fact, well I would like someone to not use the TGM book or statements and get some real references. Cause I know the description of longitudal center of gravity in defining the sweetspot plane is often incorrectly stated.

So if you have some time, I would be interested in the references.