[Mike O]

Matthew,
Below are the only two items in your post that I wanted to clarify.

Do you mean how do you precisely locate it - you can't really... just engineer impact and keep the force going downplane into the followthrough....low point will take care of itself.

Does that mean that we're into a "theoretical" discussion that is not so much practically relevant? Of course, it would depend on the speed that the shoulder center was moving up etc. but I'm guessing that you're seeing this concept of the left shoulder center moving up and therefore realizing that the low point might be nanoseconds before the lever reaches the direct vertical below the left shoulder? Do I have that correct?

Buy a webcam and mic, create a youtube account and just capture your video straight to youtube.
Thanks- I'm familiar with the webcam concept- but your advice seems right to the point and easily understandable

I thought what I was saying was extremely clear....lol
No, No, For me you have real issues there - in the written format! I only say that as feedback for you to consider. Now, on the video you were as clear as day to me.

Let me know about the first question here and then I'll be back