Under my tower speakers -- Isoacoustics Gaia, other options?

I've used GAIA IIs, spikes and springs under Spatial Audio X3s and much preferred the springs. Isoacoustics GAIA are a pain with heavy speakers on hardwood floors as they stick to the floor and you can't slide them easily.

The springs I used were modified Nobosound. The mods are easy, just drill a clearance hole then use a nut and bolt like this:

I recently switched speakers to Piega C40s and couldn't use the spring system so went back to the GAIA feet. Pain in the rear to get the speakers to move on my hardwood flooring. Then I tried Herbies gliders and they work great.

I cut wax paper into squares and placed them under the Gaia’s on my speakers until I got them into their final position.  I probably could have left the wax paper under them but I could not rest knowing the wax paper was there.  Did the sound change when I removed the wax paper?  Not at all.   

https://www.youtube.com/watch?v=5cXRYay0Mbc

I watched the video, well I jumped through it.  Their comments about the Isoacoustics Gaia feet were that it improved the sound but the mid range became harsh sounding.  They seem to attribute this problem to the Gaia feet but I'm thinking the Gaias just uncovered another problem.  Think about when the speakers are on their spikes some smearing or smoothing of the sound covers up their mid range harshness problem.  Perhaps it is a cabling issue or their DAC.  That's the fun of this hobby- one change leads to another.  And so it goes...