Pile extracting machine.
https://www.youtube.com/watch?v=_dvKeVmNvhY
Previously:
https://www.homemadetools.net/forum/...887#post164046
https://www.homemadetools.net/forum/...542#post143033
https://www.homemadetools.net/forum/...567#post155235
https://www.homemadetools.net/forum/...598#post162794
https://www.homemadetools.net/forum/...4104#post79337
https://www.homemadetools.net/forum/...178#post115841
https://www.homemadetools.net/forum/...856#post140403