Well, the title says it all! I just bought a jotul firelight 12 that was not cared for very carefully by its previous owner. From the parts diagram I found on other threads on this forum, I've deduced that my catalyst chamber is severely modified. I don't mind putting money into this stove as I got a fine deal on it so I'm going to buy a new catalyst chamber. I understand that the top if this stove comes off with a couple bolts but does this gain me access to the top of this catalyst chamber and it simply slides out vertically? Joful, I've read many of your posts and you seem to understand the workings of this stove fairly well. Hope you can help me refurbish this nice stove! In other news, I've bought a new cat and left door glass. I'm going to buy new gaskets all around and replace them. This is the second stove I regasketed. The first was my morso 1125. Thanks!!