It's been about 24 hours running with the Oak...Too early to tell any difference except stove is purring......very strong draw outside on the OAK! So my adjustable auger cover plate that I was supposed to have, doesn't exist, so the heck with my dealer I made my own. Simple, I took a piece of .24 aluminum, couple of bends, screwed on to cover about 1/2 of the exposed opening. So far, running on feed 2, will try feed 1 later. I DO have pics of my homemade auger cover plate and painted vent. I am on the road to SE MA. With my iPhone and iPad, I hopefully will send them off on Sat/Sun. No pis of the OAK but it's just about 14" of insulated 4" duct. Something new I am trying for auger grease, PB Blaster, magnetic spray lube......and just as I am typing, I heard a squeak.......Bill