@iseland I probably was not there first one to eventually realize you’re talking about a tangential tonearm, which changes the whole game.
For a true tangential tonearm, the required anti-skating compensation is essentially zero.
However, in certain designs, a tiny residual bias may still exist due to bearing friction, offset geometry imperfections, or servo lag (but I think the one you are looking at is not using servo control), and some tonearms include a small adjustment to fine-tune for that, such as the one you mention. Usually it’s extremely small (on the order of 0.05–0.2 g equivalent).
In practice the vast majority of users can run with zero bias compensation on a linear tracker.

