Isoacoustics Gaia II on what type of speaker platform?

I'm interested in the Isoacoustics gaia footers for my speakers.  The room is on a suspended wood floor with carpet.  The carpet is too thick to use the optional carpet cups.  Any experience using a granite or maple platform in this situation and then having the footers sit on the granite or maple platforms?  Positives / negatives? 
Nothing worked as well as the Herbie’s Audio Labs threaded Decoupling Gliders on the stand.

My experience, too. I recently installed Herbie’s giant threaded gliders under my four-post Sound Anchor stands for PMC IB2i, which are 95 lb monitors. I’m extremely happy with the results. My flooring is engineered hardwood glued to the slab. I previously spiked directly to the slab (before the hardwood was installed), then spiked into Herbie’s titanium glider cups. His glider cups were far and away better than any other cup I tried, including the ones from Sound Anchor. The big threaded gliders are better yet--and much better than the small threaded gliders, which I also tried, at least for my application.

By far the biggest insight: the height of the woofers from the floor has an astonishing impact on bass clarity, and hence everything up the chain through the mids and highs. I mean very, very small adjustments--a half-turn of each threaded footer, or less--altered the sound, once everything else was set in placement and the speakers were perfectly level. Get that woofer just a touch too low and the midbass thickens; get it just a touch too high and the bottom thins out. Surprised the s**t out of me! Woofer/floor interaction is little discussed but man, it’s important. The Herbie’s are threaded all the way to their low-profile base, so you can really dial in the height.

The IsoAcoustics were on my radar, and I even had the option to audition with return privileges, but they would have raised the woofer up too high, so I passed. No doubt they are excellent in the right situation, however.
I bought 2 cheap granite worktop savers and placed them under the Gaia.  This works brilliantly. It really transformed the sound, particularly tightening the bass. 
Just a thought:
I'm wondering if a thick (2"-3") maple block would sound better than any type of stone that has been known to smear sound? I'm guessing one won't know until they try it.