Good to see you are still with us! It gets a little nerve wracking when we don't hear back from somebody with CO issues...
Not to sound arrogant, but check back with us on what the dealer says. More than one dealer has steered folks wrong when it comes to burning coal.
Get a manometer hooked up, foil over the baro in the shoulder months, crack a window down there, open it up for a little more air from the ash pan air supply to run the stove a little hotter.
Since you have had multiple CO events over the years, play it very safe. Once you get a draft reading of at least .06 for a while you can make small adjustments from there to dial in your efficiency. I used to run my hand fed at .03 - .04 but i wouldn't recommend you do that until you learn your stove / chimney draft personality as measured with a manometer that is connected all the time.