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

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.

Dear Lew, Your premise about magnetic anti-skate provision

is questionable and this imply that your conclusions are also questionable.

 I own the Reed 3 P and Lustre 801 both with magnetic anti-skate provisions. There may be some reduction of the magnetic force towards the inner grooves but this is different from the Sony provision which is calculated for the whole record radius. But, like you, I use the minimal anti-skate for my Triplanar and FR-64 S.

The (possible) distortion in the right channel is the indication that at least some anti-skate is needed.

Stringreen, I deed not say to have any distortion in the right

channel of my Triplanar. I confirmed Lew's statement that

distortion will start in the right channel if the anti-skate force

is not sufficient. This can be easilly checked with tracking ability

test records. If one wants, say, 70-90 microns ''pure'' one need

to increase anti-skate force to get those values without distortion.

BTW those values are not reachable with LOMC's. I myself am

satisfy with 60 microns. This value is sufficient for any record.

However Van den Hul warned against such values (above 60 microns)

 exactly because they need increased anti-skate. Aka:

to much anti-skate is worst than no anti-skate at all. This is the

reason that some of use the ''minimal amount'' of anti-skate.

The Sony PUA 237/ 286 also uses some irregular shaped ''cam''

fastened at the collar of the arm (aka: vertical bearing). But this

''cam'' is connected with an tension wire which can be adjusted

in correlation with the VTF and/or stylus shape. I thought that no 

tonearm manufacturer copied this ''invention'' but just learned from

''some'' Aussie that Cobra and Coperhead (also from Australia)

made their own variation of this  invention by Sony .

Dear chakster, I prefer the Lustre 801. Excelent tonearm but with

mediocre lift construction. And, as Raul already recommended, the

counterweight(s) should be used in the usual way avoiding magnetic

VTF adjustment. This way the counterweight(s) can be get nearer to

the pivot.

Dear chakster,  I used Van den Hul D 501 and Silver Cable with

Lustre (then) and with FR-64 s (silver version) at present. If you

are not familiar with ''Silver Cable'' consult Don (Griffiths).