Vibrating rock screen mechanism.
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Previously:
https://www.homemadetools.net/forum/...367#post154514
https://www.homemadetools.net/forum/...628#post178224
https://www.homemadetools.net/forum/...466#post173706
https://www.homemadetools.net/forum/...515#post155011
https://www.homemadetools.net/forum/...718#post147960
