Half-track garden tractor by isavetractors. 8:09 video:
https://www.youtube.com/watch?v=dP910gY0kKE
Previously:
https://www.homemadetools.net/forum/...2740#post97020
https://www.homemadetools.net/forum/...6993#post84808
https://www.homemadetools.net/forum/...2421#post76333
https://www.homemadetools.net/forum/...2422#post96279