Outer ring - who uses and what are your findings

Another happy VPI Prime user with Stillpoints LP1 and Periphery ring.  I also have a VPI weight that came with the Prime, and on a VPI HW19 MKIII a older VPI Clamp.  The setup on my Prime, works the best, but they all work.

Schenk,
I would like to read your paper.  Please send it.  Of course there is more to a periphery ring and clamp, or vacuum system as well, than just flattening out a warped record.  Records vibrate a bit as the stylus travels through the grooves, and these devices help to dampen the micro vibrations that develop in consequence.  How much affect this phenomenon has on the sound we hear coming out of our speakers is subject to a number of variables.  I look forward to learning your thoughts of all that might be involved.
Bill