Mobile gantry crane. By TommyGun Machining. 20:51 video:
https://www.youtube.com/watch?v=Th8EjnvPjVs
Previously:
https://www.homemadetools.net/forum/...430#post169793
https://www.homemadetools.net/forum/...521#post166603
https://www.homemadetools.net/forum/...522#post142966
https://www.homemadetools.net/forum/...351#post161772
