On the topic of Gaffer tape, does anyone know what Paul Leim is using to make these "gates" on his snare and toms? If you watch the video starting at around 20 seconds you can see them in action. I want to know what's inside the tape that is heavy enough to drop back onto the drum head without dampening too much. Seems like it could be better than Moon-Gel because it isn't always making contact with the head, allowing it to open up for a second before applying dampening. Anyone tried this? What's in there? A quarter, metal washer, what??
Here's a link to the video: