No I put a streight edge on the tank and it is fine. The gasket looks almost brand new. And the little rubber flap seal around the keyhole looks great. I heard it is only supossed to vent out the keyhole but when I spray carb cleaner in the bottom center hole it comes out the side of the inner gasket inside the edge of the cap. Is it supposed to do that? I am confused. I smell gas very strong and am concerned as my heaters are in my garage. I put a nitrile glove aroud the gas cap and pushed it on the tank. Then tied a not in it over the top and it seames to help for now but I would like a permanent fix. Any ideas? Thanks