[Yoda]

rwh,

Can you tell me if the Chuck Cook videos utilize TGM principles...?

I'm not answering for rwh, but I can tell you this:

At last year's PGA Merchandise Show, Joe Daniels, president of The Golfing Machine, LLC, hosted a gathering of TGM Authorized Instructors and 'interested others.' Chuck Cook was a featured speaker, and from the podium, he held aloft the 'Yellow Book' and said (paraphrased):

"This book has made me three million dollars."

That statement leads me to believe that Chuck's videos -- I have seen none -- contain more than a little TGM.

But I also would not be surprised if, as usual...

The genius and gift of Homer Kelley remains "under wraps."