Thanks for the info. Regarding the tilting back of the arm, I probably should clarify my earlier post. With a bubble level placed on my tonearm, only 5%-10% of the bubble sits outside of the guides. To a naked eye the tonearm appears perfectly level and I would venture a guess that most tonearms are not perfectly parallel.
That being said I do not advocate excessive "tilting" either way only a slight tweaking to fine tune performance. My current settings are the result of first my own ear and second the HiFi test record. I am quite comfortable with this setting. Sorry for any confusion.