Hey Guys, Well thanks to your help I am up and burning with my used 2002 Princess. It is burning, but I'm not where I would expect it to be. It is dark out when I do my burns so I can't see much smoke, although if I stand in just the right location I can definitely see smoke or water vapor coming out of the chimney. Also, if I stand down wind I can smell a strong smoke odor. Also, if I turn the thermostat down below 1.75 the cat stalls out. I did the dollar bill test on the bypass and feel that is sealing good. Also, the wood I am burning is 13% Aspen. I do feel that I have ruled out the wood/ bypass culprits. Sooo, either of the next options are expensive and I don't want to make the wrong choice. Option #1: Draft. I had the local Blaze King dealer do the install thinking he would know all the tricks.. BIG mistake. I came home to a vertical rise out of the stoke that is ONLY 36" even though I told them I wanted to build a raised hearth next year. Even worse, they went straight up, into a 90 degree Elbow, with a 24" horizontal run into a 45 degree elbow that runs another foot before it enters the thimble. Outside doesn't look to bad, a 16 foot chimney... although I'm not certain I have enough rise above the roof line... it's close, but I'm not sure. Now... I am concerned about the design of my chimney, but I have no smoke leakage at start up. She seems to take right off and with in 20 minutes there is whistling from the double wall stove pipe did I forget to mention that earlier. Option #2: Cat. I did take the cat out of the stove before I installed and other than some red dust that was packed in about 4 or 5 cells everything look good to me. I used the air compressor to blow off the cat and a 16 penny nail (I know, I know) to carefully free up the clogged cells. During start up, I flip the bypass door right as it hits the active zone and it takes off as long as the thermostat is on 3. When I turn it down to 1 it stalls. If you where in my position, would you start screwing around with the chimney or replace the cat? Thanks in ADVANCE!