One quick addition to the notes regarding the damper lower stub - the threads are UNF - I called them AF in a moment of stupidity.
Daniel - if you have not done this before, allow two days (12 hours) for the first side, and a day and a half for the second side - especially if you want to paint everything up. With practice it could be done in one day each side, but it's physically demanding at times, so better spread out over a longer period. After 6 hours I lose concentration, so usually pack in then. In my youth I could keep going for 12 hours....