Yay! Progress!
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https://www.nass.usda.gov/Newsroom/Notices/2019/07-01-2019.php
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https://www.nass.usda.gov/Newsroom/Notices/2019/07-01-2019.php
Running "Foundationless All Mediums with No Queen Excluder". Each box is national spec, but 190mm deep.