Finally got around to to ducting for outside air on the $50 pellet stove (search for the thread that I started) that I refurbished. Much better flame. A bit more heat. Circulation fan turns on a *lot* more often. Still need to resolve, fix actually, the inconsistent feed issue. Auger/feed chute very dirty. Not getting pellets on every 'whir'. Instead I get several every 3 or 4 whirs. Suspect that this is causing me to get a less clean (more reside, etc) burn. Anybody know of an *easy* way to clean the chute? I'm thinking the Dremel snake attachment with the sander/grinding bit. Use a dental or auto mirror to, kinda, see what I'm doing.