I was wondering what is best for isolation, those rubber-type mushy feet or brass spikes. I've tried spikes on a CD player and frankly could not make out much of a difference, and only scratched the bottom of a very nice player. But now I have a TT that I would like to provide more isolation for so I was thinking of using a dense wooden board with either mushy or spiked feet. The mushy ones are about 1/2 the price. Any thoughts?