Wind turbine self-climbing crane.
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Previously:
https://www.homemadetools.net/forum/...172#post199575
https://www.homemadetools.net/forum/...371#post116652
https://www.homemadetools.net/forum/...476#post147037
https://www.homemadetools.net/forum/...741#post174839
https://www.homemadetools.net/forum/...756#post201953
