We have some staff that occasionally monitor the forums, but they are truly meant as a user group forums. We do have a contact us form, email and phone that where we answer support calls. Unfortunately, being a small company, that is the only way we can keep up.
Regarding your question, the 12VDC max is the voltage you need to stay at or under where we can guarantee that you will not damage the finials. We routinely get emails from customers running 12.5 VDC or in the 13 VDC range with no issue, but they are pushing the limits beyond what is rated. Hope this helps.