Have an offer standing on an Enviro built in 1990. The owner has not given me the model number, so I can't be more specific. He claims he was told the control board needs replacing. My question is, should I buy it and can I get a control board. I have tried to look at the manuals Rod has at Hearthtools.com, but I don't know which unit, I suspect it's an EF2. If you can give me any information, I would appreciate it greatly. The stove is 175 miles away in the real frontier, so I am not tempted to make a casual visit. The seller comes here often and said he'd bring it to me. I'd be buying it to rehab and resale, already got my fleet.