Boring a large hole.
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Previously:
https://www.homemadetools.net/forum/...573#post185853
https://www.homemadetools.net/forum/...850#post152505
https://www.homemadetools.net/forum/...986#post129701
https://www.homemadetools.net/forum/...540#post162560
https://www.homemadetools.net/forum/...029#post184080