When I owned my MMF-7, I tried the anti-skate at all the positions while tracking the HiFi News Test LP. Changing the position made no difference in how the arm tracked.
I emailed Roy Hall to ask him his advice, and he said to put the anti skate in the middle position, throw the test LP away, and listen to music.
I emailed Roy Hall to ask him his advice, and he said to put the anti skate in the middle position, throw the test LP away, and listen to music.

