i had a long and detailed discussion with vpi about the upgrades. it was put to me that the vahlhalla wire was only a benefit if a) you like the nordost presentation, b) that the full benefits came only with a full loom and that the nordost stuff didn't always like being mixed and matched.
the anti skate, i was also told was a marketing thing, because people had asked for it, and it's good business practice to give customers what they want (different from what they need!)
the individual did however go on to say that the strucutral changes to the arm did give real benefits. the individual told me he actually prefered the original wire and no anti skate, and it that it is possible to order the arm in this configuration. one imagines that this would also be at reduced cost minus the nordost branding premium. this is certainly what i am intending to do, then again having tried nordost, i have found that i'm not keen on their house sound and so have no wish to have their full wiring loom.