Hello,
When I adjusted the VTA on the VPI Prime it was really a 1/4 turn at a time. I just kept track of what I did as far as moving the VTA from zero. Besides, that was the fun part of setting it up. The hard part was setting up the VTF and azimuth just using the counterweight on the unipivot arm. I wanted to leave the side weights alone since they didn’t seem to have a locking mechanism. I was worried over time they could be bumped or vibrate out of adjustment. I am very picky when I do things with micro adjustments. After I adjusted the VTA for typical thickness of vinyl I grabbed a 180 gram record and marked the spot for that. This way you can literally adjust the VTA very quickly by the thickness of the album with the markings on the VTA dial. Just a note you do have to loosen the two VTA arm set screws by hand before you adjust. When you listen to an album dialed in with your system and your ears it is as close to audio Heaven as you can get.
When I adjusted the VTA on the VPI Prime it was really a 1/4 turn at a time. I just kept track of what I did as far as moving the VTA from zero. Besides, that was the fun part of setting it up. The hard part was setting up the VTF and azimuth just using the counterweight on the unipivot arm. I wanted to leave the side weights alone since they didn’t seem to have a locking mechanism. I was worried over time they could be bumped or vibrate out of adjustment. I am very picky when I do things with micro adjustments. After I adjusted the VTA for typical thickness of vinyl I grabbed a 180 gram record and marked the spot for that. This way you can literally adjust the VTA very quickly by the thickness of the album with the markings on the VTA dial. Just a note you do have to loosen the two VTA arm set screws by hand before you adjust. When you listen to an album dialed in with your system and your ears it is as close to audio Heaven as you can get.