Even if you don't think using the blank side of an LP is the best way to SET anti-skate, it can be helpful, in your case, to reveal natural inward skating and IF your anti-skate control is capable to counter that with a smooth amount of too little, seems like enough, too much.
Then, to refine my anti-skate by ear, I use combos of CD and LP versions of well known content.
IOW, to have confidence that the arm's controls are working properly