What is more accurate: magnetic anti-skating, or barrel weight attached a fishline?

Dear Sunnyjim,  Don't let this rambling discussion defer you from enjoying the wonders of music on LPs.  Hang on to the first principles, with which everyone agrees: (1) Skating force varies due to predictable and unpredictable factors across the surface of the LP, and there is to this day no sure Anti-skate mechanism that can sense variation in Skating force and automatically adjust accordingly.  That's the bad news.  (2) The good news is that a very tiny amount, for many, the least amount of AS, is "good enough" to eliminate  or dramatically reduce both audible distortions and wear on LPs and styli that result from the skating force, without any need to worry about variations in the skating force.  And finally, if this message still leaves you feeling anxious, there's always the linear tracking tonearm option.  No matter how you slice it, LPs rule.

I use a blank record and set the antiskating to keep the arm inn the same position. I have tried placing it near the outer edge, the center, and close to the inner part and noticed no difference.

I use an Ikeda 407 Long arm and their 9TT cartridge.

tbg....this method doesn't work....a waste of time.

Sonnyjim....I agree with lewn.   Either use a very little a/s or none...but listen to your music with enjoyment.  A/S is a tiny accomodation to the setup.  Overhang adjustment, VTF, and proper azimuth means so much more.

As I remember it, I backed off anti-skate incrementally from what appeared(both channels sounded equal-in a way) to be a "correct" anti-skate setting, and the result was an increase in the life(liveness?) of the music, and, therefore, to a more correct setting.  That shows the danger of using something(anti-skate) to correct for something else(unequal channel balance).  It is best to play with "settings" enough to see what those do, and not base settings on other things.