DD, I'd like to help you, but I don't know. The only dampening I use is occasionally a small pillow in the bass drum and a home-made zero ring on the snare, which I made by taking an old snare drum head and cutting off the hard metal or resin outer ring. I then cut out most of the middle until all I had remaining was a ring made up of the outermost one inch section of the old head. I then tucked this ring into the inside of the new batter head before I put it on my snare. It reduces a lot of unwanted ring cheaply by reusing something you were probably going to throw away. I only use this on my snare because I like to keep my toms open and ringy.