Hi

So I've got a nice, heavy ( ~30kg) DIY amp, that's currently sitting on floorboards.
I've also got a nice heavy-ish (8kg) chopping block that I want to use as a stand for the amp.
Question I have, is what will be the best iso device to place between the chopping block and the floorboards ?
There are so many options, each seeming viable.
I'm currently torn between decoupling spikes (spike pointing up), or the ISO-cup .
Any advice will be MUCH appreciated !!!