I have a Superscoutmaster......In my experience proper azimuth adjustment is the most important adjustment. VPI arms balance on a single point and will rock when imbalance occurs. There is now a 2nd pivot which is on sale now that stabilizes the arm and greatly enhances the performance. Proper azimuth can be had with the use of a Fozgometer and its accompanying test record...easy and effective. Test with the lemo connection in place.