Spent a couple hours yesterday trying to find someone willing to help. Called RTI customer service again, who tell me to call the distributer. Distributer didn't really know how to respond, so they gave me the names of some dealers that buy from them. I got "we don't do residential" from one, another that stopped responding after 2 emails. Several "let me look into it, I'll call you right back" never to be heard from again. The guy that was just a couple miles down the road is no longer on RTI's dealer list, doesn't answer his phone or respond to emails. Guess I'll try calling RTI's support number tomorrow, but am pretty pessimistic at this point.