Ekobi,
When you order the Herbies gliders consider the white elastic washers to fit in-between the cone sections of the spikes. As well, you might consider the washers to go between the securing bolts between the speaker chassis and the base. Call me crazy (that's totally OK) but when I inserted the elastic washers in that fashion, well, I'm afraid to say that the presentation seemed less "hard" and more liquidy. I know - I'm probably nuts, or its the placebo effect or I'm nuts. But they're cheap so, hell, why not give'em a try? Good luck.