Hello, got a new stove for the addition and I'm wondering whats normal. I can get it up to temp no prob but what should I be seeing for temps? Closed almost completely down with 2 small sticks I had 650-700 front stovetop for an hour or so then 550 for 2 hours. Stack temp was 350-400. I'm conserned about warping the 2ndary air manifold that you see so much on these.