Springs for homemade isolation stand

Dgad, why would you want to do this? I can see where you might think this will help isolate your equipment from floor-borne vibrations.

But if you do this what do you suppose will happen to the air-borne vibrations and internally-generated resonance already captured by and now inside your components?

More importantly, which of these three sources of vibrations and resonance induce the most sonic havoc?

BTW, nice system and room.

-IMO

Along the same vein as Markd51, you might also consider installing 3 feminine hygiene pads under each component, the rack, and each speaker.

Although it's pretty much a crapshoot for sonic improvements, the pads not only provide a clean and complimentarily contrast to most components, they also make the room smell like a cool summer breeze (a real benefit for lovers of smelly hot tube gear).

Of course this is assuming you use new pads, otherwise all bets are off.

-IMO