Correct Dennis, it was to reduce the time of the vibrations, sorbothane does ring a bell too.
My tripod sits seperately to my observatory floor. Essentially, where I walk is floating and the tripod sits on raised concrete on the ground. So my walking isn't a problem, and if I kick the tripod, thats my own fault. However, cars cause a vibration so I should only need to isolate that.
Edit: sorry for the double post.
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