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I'm clearly out-voted here, but I'm in the no sand camp.
In my case the pier is 10" square section bolted to a cubic meter of concrete.
I can push my pier as hard as I can or hit it with my hand and it has zero impact on the image. But if I so much as touch the end of the scope with my pinky finger - that's a different story - it jumps all over the place.
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