How is the best way to load an Oslo 500 to get a longer burn? If I put in large splits or rounds it messes with the airflow in the stove and the fire won't burn evenly. Also if you put more wood in the stove you will get more heat even if you turn down the air right? This is because the secondaries kick in and burn strong. My question is, I guess, how do you go for a longer lower burn setting? I would like to load it for night or when I'm gone. Also how do you load larger pieces without blocking the airflow?