hi ken
the Gaia footers screw into the bottom of the speakers they provide damping so they may have slight movement, they are directly underneath where the pods of the speaker bars are wider than the bottom of the speaker so i believe would be more stable, i could be wrong but the Bars are underneath with the pods on the outside of the cabinet so the speaker would take some serious push especially if you screw the bars to the bottom of your speakers i fancy that would provide the best option for stability i already know which ones perform better but as they say horses for courses, i prefer isolation to damping i have had some negative results damping my equipment it was Geoff that explains the difference somewhere on this discussion very interesting reading.if you want to damp your speakers you could save yourself a fortune and use the Clearlight Audio RDC cones and multi bases check them out they are cheap but very good at damping also BFLY audio from Germany offer platforms and a footer that provides damping using layers of sorbothane cork and aluminium and bamboo i believe but not cheap,
they will still not perform like the seismic bars but horses for courses good luck have a good look around, another well made footer is Track audio they are seriously well made but i believe are a type of spike and very expensive, if you are using the seismic bars for your subs and are happy with the performance i would personally stick with the same design for your speakers for system synergy i believe the answer would be screwing the bars to the holes already made in the underside of your speakers. Cerapucs and still points are quite expensive 880gbp for 4 stillpoint ultra ss, also im not to sure about stability the contact area is small it would be like your speakers are on tip toes. The seisnic bare only raise your speaker about the same height as a spike so your tweeter will be where you are used to, you can twist the bottom of the pods to level the each speaker.
