[Oldschool]

John - Thanks for the reply and link info. I already had the manual and it talks about the "art" of striking the carbon and if you do it wrong it blows out the core material on the positive carbon. This definitely makes me not want to mess with them too much. I think the broader questions are really what you spoke to regarding indoor use and the fact that they contain Asbestos. Still wondering if there is an Atlanta connection out there.