Yes, brush down, you add .5 grams to tracking weight measurement, move brush up for measurement: measure 2.0 grams, brush down, you will get 1.5 grams. (Shure calculated that the brush pushes up .5g)
Thus you set anti-skate at 1.5 grams, not 2.0.
I use the blank side of an LP to set anti-skate visually, you can check it when playing a warped LP with the brush dn, re-check when playing with the brush up, the majority of the time. Don’t trust the anti-skate dials, you will find that they are not accurate most of the time.
Down for anti-static even if LP not warped? You can check, see if it makes a difference, if so, play with it down, make above measurements
search Amazon:
Hudson Hi-Fi Turntable Cartridge Alignment Protractor Mat (Single-Sided Print, no Strobe Included)