Personally, I wouldn't bother with the ring. I have read varying reviews on it's effectiveness, from great to nothing at all. However, I have also read horror stories of the ring snapping caantilevers off of cartridges.
IMHO, there are many other tweaks out there to experiment with that are less risky to other investments, like Acoustic Revive RR-77 or Bybee filters, just to name a couple. Yes, they may or may not work, just like the ring, but there is no risk of damaging your system.
IMHO, there are many other tweaks out there to experiment with that are less risky to other investments, like Acoustic Revive RR-77 or Bybee filters, just to name a couple. Yes, they may or may not work, just like the ring, but there is no risk of damaging your system.