I recently purchased my parents home and it has a green F600 and its never been much of a problem child but the first few times its been run this year a full stove isn't lasting 4 hours. So after some diagnostics it was determined that it needed gaskets replaced. So I purchased a "Full" gasket set from a local dealer, and it was "Full" in the aspect that it had all the door and window seals. But it did not contain seals for the top plate and the insert piece. So I used the 3/8" round gasket material and followed the instructions but after dark on the first fire in it.. the stove was extremely hot with the air damper closed and the ash door completely shut. and I could see flame all around the top with a brand new gasket on it. So I redid the top with a 1/2" round gasket and i'm back at square one its one giant air leak the fires not controllable and despite knowing the part number on the diagram I cannot seem to locate any information in the top gasket and the top insert gasket. so any information you wonderful people might have would be amazing.