Rock picking machine.
<video controls autoplay loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/rock_picking_machine_in_action.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
Previously:
https://www.homemadetools.net/forum/...830#post129255
https://www.homemadetools.net/forum/...2360#post76209
https://www.homemadetools.net/forum/...220#post116000
https://www.homemadetools.net/forum/...3602#post99570
https://www.homemadetools.net/forum/...3037#post97899
https://www.homemadetools.net/forum/...1250#post74040