Audiobuilder,
Well the designer/builder stopped by with another surprise, an arm full of the darn things! He put one under my amp as well as the power supply and yes sir, it does make a difference under your amp. It seems that no matter where it is applied it pretty much does the same thing; cleaner/blacker back ground, less noise and just allows the music to flow with ease for lack of a better word/description. It appears that they fall under the catagory of "the more the merrier".
At the moment there is one under almost every piece of my gear, I was thinking "well how nice, coming by personally and putting them in my system". Yeah, now I know what they're up too-it's a trap! They are setting me up so when he comes to take them back and I can't stand it without them I'll be forced to buy em! Damn them.... ;)
John