My Castine took off tonight with a load of very dry hard maple and the surface thermometer was registering 700 with secondaries roaring away. I'd shut the air down all the way which I usually can never do and it still roared on, and I then saw the red glow of the air deflector(?) inside at the top of the door. I blocked off the rear air intake and got things slowed down- temp started slowly falling with secondaries burning nicely but not roaring. Though it's high I didn't think that 700 was necessarily an overfire, but the red air deflector is the give away... right? I've got a lot of this dry hard maple ahead of me this season. Maybe install a damper.