Hard boiled egg timer.
https://diqn32j8nouaz.cloudfront.net...r_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...337#post110198
https://www.homemadetools.net/forum/...152#post176503
https://www.homemadetools.net/forum/...555#post143096
https://www.homemadetools.net/forum/...397#post146629
https://www.homemadetools.net/forum/...716#post151998
