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


I have seen turntables from Project, Music Hall, and a few other brands that still incorporate a small barrel weight attached to short fishline string which is stretched across a hooking loop to set ANTI-SKATING. It seems to be an artifact from the 1960's and 1970's tonearm design. It is also easy to lose or break 

My question is how accurate is that "device" compared to magnetic anti-skating employed by many turntable manufacturers   Thank you

sunnyjim
My experience supports the No Antiskating option.  Each arm where I have tried removing the AS has sounded better than with any amount of AS.  These arms include Triplanar VII, Analog Instruments Siggwan, and Moerch DP-6.  I also used a VPI JMW-10 for a number of years without AS but since it didn't have the option of AS, I am not including it on the list.
I’m unaware of any standard or measurement for anti-skating that allows the notion of accuracy to apply universally across different tonearms.

Check this thread for some great information on the topic of anti-skating:
https://forum.audiogon.com/discussions/do-45-rpm-records-need-higher-anti-skate-setting?highlight=lp%2Brecords

By the way, could you say a few turntable (tonearm?) manufacturers that offer magnetic anti-skating? 

The most accurate anti-skate provision is  provided by Sony

PUA 237/286. By this provision the anti-skate force is different

depending from the record radius. Neither later Sony tonearms nor any other manufacturer has copied this ingenious invention. Very strange because the usual kinds with equal force at any radius is obviously inadequate.

Nandric,
I think a magnetic set-up could provide for variation of the force with respect to the radius of the LP, depending upon how it is implemented. So, since there are many tonearms that use magnetic methods, why is the Sony so much better?

To the OP, Since the skating force is varying constantly along the surface of the LP, is a moving target that you can never hit with confidence, there is no point in getting worked up over the exactitude of the anti-skate force.

Salectric, I have a Triplanar, and I have listened to it with no AS.  In my system, I hear a pronounced and obvious distortion in the R channel especially. This is cured by re-application of a very small amount of AS. From this I concluded that the Triplanar, or my Triplanar, sounds best with a very small amount of AS.  I know that Doug Deacon and some others also expounded upon the evils of the Triplanar AS device, that it introduced some spurious resonances, but I don't hear that problem, either, so long as all the attaching screws are tight as possible.
Why is everyone so fixed on Anti-Skate?   I use no antiskate at all and find the sound more open and free than when I use antiskate...but it really makes little difference....the use or non use is equally wrong....it is impossible to properly set for antiskate....the force is very slight and is constantly changing.