Minimum ice thickness guide.
https://diqn32j8nouaz.cloudfront.net...s_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...471#post122631
https://www.homemadetools.net/forum/...746#post190322
https://www.homemadetools.net/forum/...201#post145832
https://www.homemadetools.net/forum/...886#post190856
https://www.homemadetools.net/forum/...464#post146965
