Assuming a Rega arm and three bolt mounting there’s not much to adjust beyond VTF and antiskate bias. When I used my Rega 300 arm I found the VTF scale agreed well with a balance but the antiskate was way off. Anti skate setting is a whole can of worms, how are you setting yours?
On my early RB300 with a cartridge tracking at 2g a bias setting of 2 gave a similar effect when using the cuing lever and resulted in a skewed cantilever after a couple of years. The next cartridge I set using the blank disc method (actually the bias setting track on EMI’s The Enjoyment of Stereo, a copy of which came with a job lot of used records), still not perfect but that cartridge (same model) stayed straight, though after 5 years my DV17d2’s stylus showed a bit of uneven wear when examined under a fairly powerful stereo microscope my local dealership had. From memory of 25 years ago the setting was much nearer 1 than two on Rega’s bias scale.
Another method is to listen for equal distortion on both channels of a test record torture track (The hifi news one has a series of these), be alone in the house when using this method.
