I use my VPI Peripheral Ring on my VPI platter with either a BDR screw down clamp or a Stillpoints clamp to great effect, also feel that it gives my unipivot arm it’s best chance of less movement so it will work it’s best and also adds mass as a flywheel effect. Wouldn’t use my table, Prime w/SMFA, SDS and peripheral ring with our it. Just sayin.