Sounds like you need to set up the anti skate. Check out Peters Tutorial on you tube. He absolutely believes that you need to use it. It made a huge difference on my VPI especially with the original 3 D Tonearm. You will most likely need some small washers in addition to the o rings to achieve the correct anti skate. The Tonearm should move very slowly towards the spindle while not in the record groove. Give it a shot u got nothing to lose.
INNER GROOVE DISTORTION
Seasons greetings! I have a VPI Prime Sig. with a Soundsmith " The Voice " cart. and am having an issue with inner groove distortion. I don't use anti-skating, just twisting the cable going to the junction box. I will be upgrading the arm to a Fatboy soon and when the tech comes to set it up we will address the issue. On some records I can't listen to the last song! Frustrating, any feedback will be appreciated. Also, have Pass XP-25, ARC Ref 3 and 75 with ML ESL11A's. Thanks.