Experience in isolation/resonance tweeks & brands?

http://forum.audiogon.com/cgi-bin/fr.pl?vaslt&1120948861

I have spent the last 4 years playing with relatively inexpensive vibration and resonance control devices. These include Symposium padz, myrtle blocks, audio tekne carbon blocks, super cheap MG4 gel resonance controls($5 for 4), Lead bars and weight bags. They all do something, depending on where you put them and the real question is whether they do something good. It's a tweaker's holiday with these items and the best thing is that for 4 years I haven't spent thousands of dollars on new equipment (other than a new blu-ray/ sacd player which was greatly improved by a lead bar and some other assorted devices on top of walker feet). I can succesfully change the character of my system with these devices and continue to explore the potential of the equipment I already own.

Don't ever use shelves made of glass.
I like sorbathane pucks for CD plyers
And hard rubber feet(herbies for amps & preamps)
Based on 35 yrs of listening