I've tried a few methods of making these. This is the best I've come up with so far. It's not quite as aggressively dampened as a SuperKick 2 but can be with some tweaking. (Different "donut" material") The cool thing is it can be "tuned" in infinity depending on width and materials used.

[ame]https://youtu.be/Ei_wwj37j40[/ame]