Robotic stacked parking mechanism.
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Previously:
https://www.homemadetools.net/forum/...313#post116359
https://www.homemadetools.net/forum/...2627#post96737
https://www.homemadetools.net/forum/...119#post141325
https://www.homemadetools.net/forum/...915#post133647
https://www.homemadetools.net/forum/...295#post116282