Where does one place AQ sorbogel feet?

I got 3 AQ sorbogel Big feet. These are supposed to reduce mechanical vibration by absorbing energy and releasing it as negligable heat. My question is where under the cdp or amp do I put them. Everyone seems to use them in threes and there are 4 feet. Do I place 2 on the insides of the front feet and 1 between the back feet? Does the flat side face down or up? What do I use to protect cdp and contact points (theyre sticky)? Anyone have experience with these and how do they sound? Thanks in advance!