Isoacoustics Gaia II on what type of speaker platform?

I recently tried GAIA II footers w/ slate slabs under them. They really worked to add great depth and a floating 3d quality to the imaging... But I have Harbeth 40.2 speakers, which have a resonating cabinet type design and the footers made the speakers to lean. 
 For what it’s worth, I tried two other speaker footers and they all screwed with the tonality in one way or another...but thats harbeth for ya. Nothing worked as well as the Herbie’s Audio Labs threaded Decoupling Gliders on the stand. 

Yes. I would think with carpet that a spiked footer would be the way to go. I have a pair if Magico A3. They come with stock spikes and pads or you can get Magico’s APods, which are also spiked. But I have hardwood floors and because of where my A3s are in the room, I was concerned about brushing up against a 100 lb speaker and inadvertently knocking a spike off its pad. So I looked for a different foot both for safety and acoustic purposes. I got the Isoacoustics Gaia I feet. I love them. Very stable and have a suction grip on the hardwood floors. Acoustically, good. How much better than stock points and pads. I am not sure. But what I am sure about is that for my purposes above, the Gaia I feet are a net positive. 

I too tried the Herbie's decoupling gliders, and preferred my previous spikes better.  The Herbie's softened the mid range and high end to an extent I didn't care for.  I now own the Isoacoustics Gaia I, and couldn't be more pleased - pricey, but well worth it.

I put my speakers on Gaia’s on top of thick maple cutting boards and felt that I got quite an improvement in resolution and imaging over the spikes that I used previously.  My listening room is in a basement with a fairly thick  area rug over a concrete slab. Speakers are AltaAudio Rhea’s. Never tried the carpet cups.