Azimuth, azimuth, azimuth. Correct azimuth provides maximum separation, the critical step in sound-staging. Small adjustments can be heard.
All these folks are telling you many things including how to spend your $$. Fact is, if it doesn’t come off the disk properly it will never be at its best. A VPI set-up will provide a means for adjusting azimuth. Set if first carefully by eye. But learn how to make small adjustments in it and set it by ear. A VPI Dual Pivot Assembly will make that far easier, improve tonearm handling and even SQ. That’s the very best way. You really don’t need expensive set-up stuff.