[Warbaryan]

Can you elaborate?

Placing a weight upon different spots in the body has been applied on several occasions, and the balls (or thumbs/fingers) have been used in other forms than those that appear in the book.

There are probably some documents (some people's notes) lying around in the internet chaos, but the best way to learn the stuff is probably through someone who has learnt them at a seminar, or by attending them yourself.

Here is where the value of practice groups is evident. The perpetuation of knowledge through passing it onwards via practice. (The difference of "showing" and "telling by words" communicative methods.)

Someone else could add a bit more detail, perhaps?