This is my first season with a pellet stove. I have a thermometer stuck to the side on my new p61a and am concerned about overfiring it. I have been running it where the temp of the steel gets to 500 degrees. Stove is set at feed rate 3 and stove heat set at 2.5. How hot can the steel itself get before it warps? Don't want to wreck a new stove. Trying to learn all that I can. Thanks.