I can claim no particular expertise, other than the reliance on those who know far more than I, and who can and have 'walked the walk', including that other 'talking' part. That, and since I have somewhat of a physics, math and engineering background, I feel I can reasonably recognize good engineering, design and fabrication. For example, if you talk to someone who claims to be 'into' audio tape recording, and he doesn't instantly know and appreciate the difference between a portable Sony and a Nagra, then one should just smile and be courteous, and change the subject.
(Witness the 'Taurus vs. the Rohrbaugh' conversation elsewhere on this forum).
All that said, all credit goes and should go to Bob Cogan at APW. There are very few like him - not only skilled, experienced and supremely knowledgeable -- but also a good, fair, honest, decent hard-working man. To this country's detriment, I think these are getting harder to find.