I use the VPI Periphery Ring on every play. It does what it's supposed to do. It stabilizes the image, lowered the bass floor as well as helping to deal with warps. I've used the screw on clamp with the grommet under the record. It can cause the record to form a dish or a dome. The ring does a very good job of damping resonance generated from the record not in contact with the platter, even with warped records.
