Excellent advice,
it's time these charlatans were cleaned up, leaving the field clear for people like myself. I did mention my system? The Cosmic Vibrato? It's centred primarily on perturbation theory with a smattering of a nod towards m-dimensionality, (plus chocolate sprinkles).
You want to watch that Jurik lot though, it's always been my experience that you should never trust anyone who can't spell Pythagoras properly
Dave