Mini chainsaw. By Make it Extreme. 12:09 video:
https://www.youtube.com/watch?v=i0ni-BbCmkc
Previously:
https://www.homemadetools.net/forum/...895#post175548
https://www.homemadetools.net/forum/...244#post172791
https://www.homemadetools.net/forum/...993#post164497
https://www.homemadetools.net/forum/...297#post169349
