Best CDP isolation device you use?

1/2" balls on top of 3 Aurios pros on top of Symposium ultra on a rack resting on more Aurios pros.

Resolution Audio Opus 21 sitting on 'large' DH cones (the smaller rubber feet on the cdp are junk). This sits on a Machina Dynamica Nimbus, which in turn, sits on a custom made Sound Anchor platform (w/spikes going through the carpet and a three-point contact on top).

I found the Clearaudio Magix to work very well. They are expensive, but when you consider they totally decouple the CDP via magnets from any floor/shelf born vibrations, it's probably worth it. You can also save money by not having to invest as heavily in specialty equipment racks or bases.

2nd on the nimbus. nothing else really compares

Good or bad I just installed a Sklan isolation platform under the titanium cones under my CDP and I'm blown away. The shelf was the best isolation device I have used or added so far. I have brass cones on most components with good results but this platform has added a dynamics to my system that I id not know I could get. My best tweak but then again every little bit helps. Usually.