Chris,
I attended David’s clinic at the ITG Conference in Denver. I’m not sure if you’ve seen the summary that I did of his class (the part related to sound production), but it went into even more detail that what was shown on the video clip at the Yamaha site.
Go to this link
These are the ideas that should shine extremely brightly (using my earlier metaphor) and be seconds or at most minutes old, but unfortunately, they are often clouded by the discussions of strength in these forums, and tend to be very distant, if visible at all.
If you ever hear that Jim Thompson is planning a trip to Arizona, please post here! I would love to hear him live in a master class or even schedule time for a lesson.