Crutches with wheels.
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Previously:
https://www.homemadetools.net/forum/...715#post209742
https://www.homemadetools.net/forum/...062#post129969
https://www.homemadetools.net/forum/...188#post211177
https://www.homemadetools.net/forum/...851#post198473
https://www.homemadetools.net/forum/...814#post198312