@lewm no one is suggesting that the cantilever is off, the issue is with the stylus. Here's a clear explanation of the difference from Mikey (paragraph 8)
http://www.analogplanet.com/content/crazy-little-thing-called-azimuth-part-1#x6kLUutKlRvolsZM.97
http://www.analogplanet.com/content/crazy-little-thing-called-azimuth-part-1#x6kLUutKlRvolsZM.97