Floor protection from spikes

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).

What method are you using to attach or put these items under such heavy speakers?