Guest hosts are Ok for the short term, but the reason David saw through the B.S is because he is an experiencer. I don't know the background of all these people mentioned, but in any field, be it your doctor or mechanic, who would most likely cut through the theories, cut off the BS debates- and find the problem?... Would it be the one who has read hundreds of books, or researched (another term for listening or talking to the experiencer) or the doctor who has spent his time with his elbows in the shit/blood or the mechanic with permanent grease under his skin? I vote for someone who is like David, not only extremely well read on the subject, but understands with his very soul what it feels like, tastes like and should sound like. A biological lie detector created by personal experiences and soul searching/insight, built slowly over a life time.