I'd say you are doing real well. I have a new home, 2800 sq.ft. including finished basement, 6" walls, R39 or so (14" of glass in the ceiling) in the attic, pretty tight construction. I burn 20# a day heating the basement and part of the updstairs. The furnace still runs a decent amount depending on outside temp and wind. I estimate that I'd burn at least a bag a day if I was heating the entire house. I have a 80K BTU input (72K BTU output) natural gas furnace, and if it's below zero or really windy, it will JUST keep up with the house demand. So, if I was lucky and had hot water, a KAA-2 would be a good match, and likely I'd be running it pretty hard on the cold nights.
Sounds like you're not even running your unit that hard if you have 9 turns left on the adjuster.
Just a question - how big are your bags? 40#, 50#, 100#? 40# a day is only 21K BTU input, which is very little heat for your size home on a cold day. Frankly, I would expect something between 80 and 100# a day in really cold weather.