'Mind your p's and 'q's' is an odd turn of phrase, at least one source being as a warning to typesetters. They were fined for every typo, so needed to take extra care when selecting the metal slugs and locking up the case. So now you know (at least one reason).
Don't forget to grab the editable eps and use the character for your project, or smash it up and send me a copy back. The edit's I'll feature here as a changelog to track its development.