Trolleys for lining the walls of an in-ground water tank.
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Previously:
https://www.homemadetools.net/forum/...013#post134001
https://www.homemadetools.net/forum/...680#post118469
https://www.homemadetools.net/forum/...048#post129912
https://www.homemadetools.net/forum/...105#post125840
https://www.homemadetools.net/forum/...298#post116295
