[Mike O]

Annikan,
Let me cover most of the issues that I see and if needed and as time allows we can clean up any remaining issues on this.

Using the quote from 2-F and relating it to our discussion.

1) I'll give you credit that Homer's using the longitudinal center of gravity and sweetspot to mean the same thing. Whereas I was further defining the sweetspot as that point on the face of the club where the longitudinal center of gravity passes through (one point on the line of longitudinal center of gravity). So why your original post was more in line with Homer's writing and correct in that regard- I still prefer my distinction and clarification, as his could infer that if you hit the ball half way up the shaft with the Longitudinal Center of Gravity (LCG)-Sweetspot- that you would miss the ball with the shaft but passed through (hit) the ball with the LCG.

2) In regards to your original post "Hinge Action - Clubface" "Swivel - Clubshaft rotating around sweetspot". Again, strictly from the 2-F quote- Homer's saying the Clubshaft is rotating around the sweetspot throughout the swing.

Two othe clarifying issues in regards to the 2-F quote and your original post.
1) If you or anyone is thinking that his comment regarding "Turn" has ANYTHING to do with Swivel, then they are mistaken. The only similarity would be that Swivel requires a turned position of the clubface, and in his 2-F quote he is saying if you're shanking it - because you lost lag pressure, that if during start down, you turned the clubface so that the shaft and sweetspot were on the same plane- that if you did throw it- i.e. threw the shaft instead of the sensing and controlling the sweetspot with lag, that in that case you would also be throwing the sweetspot at the ball by default and you wouldn't shank from that situation.

2) Again, strictly speaking from his writing method- you have a point on one issue- in that he talks about the shaft rotating around the sweetspot "Except during impact"- which is the period of Hinge Action. However, that only makes sense in a very narrow context- impact is just one part of the overall circle- and nothing different or mysterious happens separately at impact compared to just before or after it.

In summary, I stand by my original post. In addition, your follow-up post added the quote from the book- but I wasn't clear if you were making additional points or what additional arguments you were making- however, I took the liberty to assume a couple of potential ones that I saw.