This is pretty bad. Although, if it matters, I know that the instructor being referred to now uses Trackman and I would guess (dont know 100%) that he is now aware of the "new ball flight laws". One other top teacher (not a real big name, but in the top 10 in GD) has come out and openly stated that Trackman has completely altered how he teaches ball flight. I have a video of him from about 5 years ago explaining the "old ball flight laws", and now I know first hand he is "in the know". As for Mr. Harmon, if I had to bet, I would bet that he does not know what we know about ball flight, certainly not what Brian knows.