INNER GROOVE DISTORTION

The VPI  Gimbal pivot is better in some ways than is the single pivot (spike).  The more solid bass, etc. ...greater clarity from the gimbal can be had by adding the 2nd pivot modification to the spiked arm.  Easy to do and for 150 dollars is money well spent.

Ct, You wrote, ""anything" that is going to impede the stylus travel, be it tonearm setup, alignment, antiskate, condition of record - will be heard more readily at the end. Another challenge for the vinyl audiophiles."
Can you be more clear about what you wanted to say here? Because in some sense, none of the factors you list, maybe apart from dirt in the grooves, would be expected to impede stylus travel.  I believe the traditional meaning of the term "Inner Groove Distortion" refers to the fact that, as you mention, the LP has to crowd musical information into an increasingly shorter linear path, as the LP runs out of grooves. (Plus there is usually more tracking angle error on the innermost grooves, unless you're using Stevenson alignment.) There are analogies to this phenomenon in tape and digital reproduction as well.  Tape running at 15 ips and using half a track would be expected to provide much higher fidelity than the same tape running at 7.5 ips an using only one-quarter of a track, etc. And this is also why in theory 45 rpm sounds better than 33 rpm.  I'm sure you know this, which is why I wonder what you are saying above.

I must confess to have been very proud when I succeeded to
get 90 microns ''pure'' (without any buzz) with my (then) Ortofon
MC 20 with the help of my test record. The part about ''tracking
ability'' test. But then I come across the warning by Van den Hul:
''no antiskate is better than too much antiskate''. To get those
''impressieve'' 90 microns I needed to increase antiskate force.
So whenever ''buzz'' appeared in the right channel I increased the
anti skate. But thanks to Van den Hul I still have no idea how
much anti-skate is ''allowed''. So I use 0,5 g force for each cart. 

Almarg
Hopefully you will then be able to find an amount of twist that results in minimal or no deflection at all positions on the record.

@almarg

Hi Al - there are not multiple twisting increments permitted with the design. It’s more like .....are you going to do One twist or nothing.
To explain. If you look at the wire loop in the attached pic link. my former VPI JMW 12 tonearm.

https://photos.app.goo.gl/M2KjNpVbyxNCbbHM6

imo - Unless VPI has changed the materials used (wire and teflon coating type) in later wire loops.... then there is not a lot of twisting that can be done here. The wire loop is of a "construction" that provides for push back when "not" twisted. So anti-skate is there without any twisting. In addition to this, the springing action of the wiring provides for increased anti skate action as the loop is "closed" towards the end of the record.

I assume, when VPI added in an anti skate mechanism in later years, the amount of AS needed, would be below minimal, due to the anti skate action of the wiring itself.

From what I recall adding in even one twist of the wire for me - produced problems as other posters on this thread indicated. I also wonder how many of those taking shots at this tonearm / wiring technique - ever owned a VPI uni pivot tonearm ?

Cheers Chris

Joey's problem is probably due to several factors conspiring against inner groove tracking.
It does appear people tend to underestimate the skating force. If you think you are going to counter it with twisted 24 gauge wire at the fulcrum of a 9 to 12 inch lever arm you might as well try to stop a car rolling down hill by standing in front of it. Defeat your anti skating device and try playing a blank side. I would suggest putting an old worn out cartridge in first. Play a record and gently defeat your anti skating device by lifting it up and watch carefully to what happens to the cantilever. It will deviate a millimeter or two to the outside as the stylus leans heavily on the left channel unloading the right channel. Play a Hi Fi News anti skating set up groove and listen to what happens to the distortion in the right channel when you defeat the anti skating device. I might further add that in regards to vinyl playback distortion = record wear. 
Simonmoon, I highly recommend getting the new 3D printed 12" gimbal tonearm with anti skating by VPI. I do think this would make more than a trivial improvement in your vinyl playback given your current situation.

Mike