Floor protection from spikes

Do yourself a favor, the Gaia 1 is a very good product. You have some very heavy, large speakers. As I do.Joseph Audio Pearls. I went through the very same thing as you are, Herbie's, disc's, even thought of actual hockey pucks! The minute I installed the Gaia 1's, problem solved. I looked at the Campanella 2s, the Gaia's come with 4 different size shafts.If the speakers have some odd size the owner will send you what ever size you need. In all likely hood one of the 4 will work. You have expensive speakers, what is underneath them is important for SQ. The only issue (not really an issue) with the Gaia's is once the speaker are in place, they are not easy to move because the Gaia's suck onto the floor. Best to place a carpet under and use the carpet to position each speaker. Then remove...

I believe I ordered (maybe too quickly?) the 70 hardness sorbothane pucks. Now looking at Herbie's gliders.
Thanks again.

No worries. The EBAY listing provides little useful information and you were not given direction here. Perhaps you can contact the vendor and change the order to 30 hardness. Even cutting a single 70 hardness puck into 4 pieces will be quite stiff.

The Herbies gliders are great and come in three different variants of brass, titanium and I believe stainless steel. I use them (brass) under the factory spikes of a pair of 160lb Wilson Sophias to great effect. Initially bought them just to ease the movement of the Sophias as I adjusted the sweet spot and removed them as that was achieved but was quick to put back as the improvement with them was quickly made apparent.  Enjoy the music

They also come in giant size (which you might want), and regular "cup" shape or with integral thread (lots of different size threads).