Homemade floor protectors -- advice needed

Those little saucers that come along with audio points are claimed by the manufacturer (via instrument measurements) to actually improve coupling, so are not supposed to degrade the effect. If you don't want to use those (agree that sometimes it is inconvenient) what I've done is to save those data CD's that come with AOL junk-mailings, & place them under the spikes so I can slide things around a bit until best placement is determined. After that I remove them from under the spikes leaving nothing underneath, or sometimes then installing the protective coupling saucers. Those junk CD's can also be sawed into smaller size pieces if necessary.

Linn makes floor protectors called "skeets", they are heavy metal discs with holes in the middle for spikes. They slide easily when you need them to, without scratching.

Instead of Stone, I would encourage you to use either MDF, HDF, or Corrian. These materials are more dense in an irregular manner. Stone, Grannite esp. is an amalgum of different metamorphic rocks with very regular crystaline structure, Marble is pretty soft and purous. If you still want to use Stone, use Granite, but do NOT polish it, allow the rough irregular surface to be present so as to remove the pollished mirror effect.
Happy listening

I have audio points under my speakers and have used their discs for my last place's hardwood floor. My speaker are about seventy pounds and three feet high so, I needed another person to help me put the spiked speakers on to the discs. I forgot how exactly how we did that, but it was not easy. I did not, however, have a problem with sliding the speakers around as long as I held the speakers by the bottom edges on both sides. The spikes never came out of the discs as long as I did not lift up on the bottom of the speaker much. The discs work very well by the way. But for anyone interested in getting the audiopoints spikes, you might want to look in to the larger diameters. My smaller diameter spikes have left nasty rings on the bottom of my speakers.

Best use of those AOL CDs I've heard yet. Bravo. I've been using pennies and, believe it or not, one the spikes went straight through one after about a year. Think it would be cost-effective to upgrade to nickles?