I was very proud about myself when I got 90 microns ''pure'' from
my combo Sumiko 800 + Ortofon MC 30. But then I have read
Van den Hul's warning not to use too much anti-skate needed for
such values. Too much anti-skate was worse according to him
then no-skate at all. By all his carts one get anti-skate values for
his sample.
The other problem is that this ''force'' also depends from record
radius. So, obviously, the same anti-skate for the whole record
is also problematic. I ever owned the only tonearm with ''variable''
anti-skate : Sony 237 with an ingenious ''curved'' lever with
different anti-skate related to record radius. In addition there
was provision for stylus shape. I give up anti-skate not because
I don't believe the theory but because there is no way to do this
correct.