03-12-15: Stringreen
No one can control the a/s that's needed or preferred because the force is constantly changing.
In my experience (as described earlier), all of it involving MM and MI cartridges, as I had mentioned a change in anti-skating force of about 15% from the value arrived at per the procedure I described will result in EASILY perceivable deflection of the cantilever from its normally straight-ahead position. Yet at the same time, as I said earlier, once I have adjusted anti-skating force per that procedure there is NO perceivable deflection at ANY point on the record (apart from deflections that may be caused by large groove modulations, of course).
That would seem to say something about the DEGREE to which skating force varies during the course of the record.
Regards,
-- Al