Mechanical Heart #4 kinetic sculpture by Mark Galt.
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Previously:
https://www.homemadetools.net/forum/...452#post122472
https://www.homemadetools.net/forum/...246#post192067
https://www.homemadetools.net/forum/...520#post189431
https://www.homemadetools.net/forum/...873#post152574
https://www.homemadetools.net/forum/...139#post134471
