I know I probably sound like a record with a scratch, but Paul McGowan is an artist when it comes to peddling BS and snake oil, as much as I hate what he is trying to do I have to take my hat off to the way he can carry off that avuncular and eminently reasonable delivery style he has.
A couple of years later, I was in a shop in Boulder, looking at a used PS Audio preamp. I asked to hear it, they wired it up, and - no sound. The salesman was mortified, but I just said, "Try taking the top off and then putting it back on." He looked at me like I was insane, but went ahead, took the top off, and then put it back on. And it worked fine.