I've had some off/on wobble on some too. Never figured out that issue really. I swear sometimes if side A had a wobble, I would switch to B, then back to A and it sometimes seemed to not wobble. Otherwise if the 45 speed is constantly off, there is the adjustment on backside of the turntable board to alter the 33 speed and 45 speed separately.
A month ago I was tweaking one with a DJ friend of mine as he of course has an ear that is much more fine tuned than mine so he could tell the VZ2000 I hooked him up with was running constantly a hair fast. So I were tweaking it a bit and then he wanted to try and he was beat matching between the VZ2000 and his cellphone. Hitting play/pause.... play/pause to get the phone synced. I told him that might be a first. A DJ Matching 1982 boombox technology with a 2013 smart phone. Anyways, I had to take a pic as it was just funny to see a damn good DJ beat match on such a wacky combo. So that's him in the pic with the hair, not me. He goes by Plain Ole Bill, head of the Get Cryphy crew and been tour DJ for Atmosphere/Brother Ali/POS, etc.
Later I hooked it up with a proper Tech1200 turntable for much easier beat matching as we adjusted the VZ2000 to the much easier to cue 1200. We got it to where we thought it was darn near perfect. Then I put it back together and of course it was like -4BPM off. Just finicky and annoying. But then we'd play A, then B, and A again and it might seem fine. Maybe the vertical direct drive turntables and are just never perfect, but as good as needed for most that don't have a fine tuned ear, other than the wobble issue.
Belts were both changed and the gearing cleaned.
