You're welcome Dave. As I mentioned, most of what he says is certainly over my head but I'm always trying to learn and I really like theory. I have watched probably 10-15 of his videos now and it is amazing what he knows. He still runs workshops at age 89. One interesting thing is he apparently thinks that John Coltrane, Miles Davis and Herbie Hancock are not "real" jazz or at least that they have "sold out" in some form. Reminds me in a way about the debate over traditional country music and the current crop. So Harris is somewhat controversial.