If its any help,my old dob has 3 small teflon pads(35x20x4mm) on the bottom base, the top has a LP record(KTEL various hits)fitted to it for the pads to ride on.The complete dob base is made from 6ply.It's monstrous and heavy, but in the 10yrs I've had it (bought second hand) it's still moving easily and freely.I've only pulled it apart once to remove a small stone lodged in there when we were paving.Just another option maybe.
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