We've had our Oslo for 8 years, and love it. We've had had very few problems. But last week, my wife found that a set screw had fallen from the ash pan door hinge. I hadn't even known about it. Now I'm trying to reinstall it (it takes a small torx wrench), and there just seems something odd about it. It seems to go in only part-way, and at that point it still sticks out enough so that it acts as a door-stopper and prevents the (ash pan) door from opening all the way. It also seems to raise the door too high for it to close. Right now, the ash pan door is lower on the latch (left) side, and we have to lift it a bit to get it to close properly. What is this screw actually for? How far should I be able to screw it in? Is it supposed to control the door height?