Core drilling rig.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...w_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...rge_yellow.jpg
Previously:
https://www.homemadetools.net/forum/...473#post131908
https://www.homemadetools.net/forum/...400#post196670
https://www.homemadetools.net/forum/...143#post191668
https://www.homemadetools.net/forum/...680#post182669
https://www.homemadetools.net/forum/...834#post186746
