Crane drops excavator into tunnel shaft.
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Previously:
https://www.homemadetools.net/forum/...024#post134066
https://www.homemadetools.net/forum/...825#post137094
https://www.homemadetools.net/forum/...733#post128961
https://www.homemadetools.net/forum/...368#post127014
https://www.homemadetools.net/forum/...772#post140135