Good work knghifi, these Titanium Cone/Spike Decoupling Glider will be the way to go if you have a suspended floor and you still want to use your speaker spikes. Some very good feedback from purchasers with suspended floors. http://herbiesaudiolab.net/csglider.htm
As from what I can see the Stillpoints wouldn’t be right for a suspended floor as they don’t decouple from it at all, they actually couple, and nowhere on their site do they even get into decoupling for suspended floors.
Cheers George