Just to add: Thanks so very much for pointing me in Shinzen Young's direction. I read the article which I found extremely interesting, and I've bought his book (kindle) "The Science of Enlightenment" which I shall read, also with great interest. I've read probably a hundred books by now on meditation and Buddhism, both Theravada and Mahayana (Tibetan and Chan/Zen), and I'm a bit of a Buddhist mutt, amalgamting all I've learned in my practice, that's why I think Shinzen Young will talk to me very strongly. So, again, thanks a bunch.