Forgive me if I haven't read every word of every comment posted on my thread
(please point it out if I've missed something), it has gotten pathetically long as people continue their pissing contests .
I understand the challenge to accurately mount a mechanical transducer where it needs to be perfectly aligned in 3 dimensions: pitch, yaw & roll to put it in common terms. My tonearm, the Linn Ittok, doesn't provide for adjustments in roll (azimuth). I know that this can be measured with a test record and a scope. If azimuth adjustments need to be made, I can get shim stock.
My question is how can one accurately measure yaw (twist) and pitch (VTA)? I have a USB scope but trying to accurately measure the angle of a stylus to a record surface, or the angle of a cantilever to a record groove using a cheap optical instrument while coping with parallax seems silly. Buying software that magically simplifies this seems more so (again, correct me if I'm wrong).
On the other hand, I'm sure some do it by ear which IMO shouldn't be dismissed. The best musicians I know tune by ear and they understand that no acoustic instrument can be "perfectly tuned" but they know what works 90% of the time.
Please help me make sense of this. Thanks.