Flame rollout was crazy on this one so I knew it was going to be dirty when I opened it up. Didn’t expect it to be as bad as it was. Who knows for sure but it might have not been cleaned since it’s original install, that was in 1986. The draft hood was corroded on to the vent collar and there was not a 7” hood in town so I had to cut it off and save it. For that I decided to use the new @diablo_tools Thin Metals carbide tooth recip blade on my Fuel Hackzall. It works well for cutting that old st