Isolation Platform for CD Transport??

Best for the money (expensive though) is vibraplane. See
www.soundsofsilence.com.

You'll find lots of discourse by searching for shelves, isolation, etc. I continue to be VERY happy with my Neuance iso/absorp platform shelf under my CDP. Clearly a tighter, more coherent sound than air suspension or cones-alone.
Good Luck. Ernie
PS You may wish to address Redkiwi or Caterham directly re experiences and theory of operation.

I will second the Neuance shelving, which I support with upturned spikes (built into my rack). Very even handed without the annoying dips and peaks that I always seemed to get with my previous isolation methods. The music also has a better pace to it now. It is very simple as I just rest my components (with their stock feet) on the Neuance shelves and no longer have to concern myself with gear toppling off of cone points and such.

Nimbus air latform. see www.machinadynamica.com