Mystery pipe wiggling mechanism. Anyone know what's going on here?
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Previously:
https://www.homemadetools.net/forum/...347#post169486
https://www.homemadetools.net/forum/...578#post166813
https://www.homemadetools.net/forum/...371#post166009
https://www.homemadetools.net/forum/...151#post157607
https://www.homemadetools.net/forum/...614#post162874
https://www.homemadetools.net/forum/...060#post160712
https://www.homemadetools.net/forum/...824#post100116