Articulating 4x4 dump truck. By Mike festiva. 24:38 video:
https://www.youtube.com/watch?v=BrNkQFA97nk
Previously:
https://www.homemadetools.net/forum/...791#post152291
https://www.homemadetools.net/forum/...166#post134584
https://www.homemadetools.net/forum/...827#post111737