Damping between shelves and sandbox


My turntable is sitting on a sandbox. On the top of the sand I have an inch and two inches thick maple board. Between these two wooden boards I am using cork coasters. I`d like to find a better solution, but I don`t really want to use glue. I am thinking to get a non slip mat, but searching for better alternatives.
What would you use?

Both, the turntable, and the int. amp sitting on a DIY sandbox and plinth. The plinth is a bit smaller than the box, so It`s not touching the wood corners but sitting on sand. But, handling sand can be messy sometimes.
What would you mix with the sand so It`s not creating dust?
128x128korakotta

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