On the official POTCO site, just go to "contact us" and shoot them an email. There will be options on a drop down menu for the type of question you're asking. The Q&A snippets that they post on the site are probably random, so just because you send in one doesn't mean it's going to be published on the site. You will, perhaps, eventually, maybe, get a response to your question from the POTCO staff.....just don't hold your breath, or expect anything other than a canned response.
Hope that helped