Does anyone here have experience removing the carb fuel inlet screen from these new Avstar carburetors supplied on the lycoming o360 engines? They look the same as the Marvel ones they replaced but there isn't a copper washer with the finger tabs bent over a nut flat like the marvels on the opposite side of the inlet connection. There is a slotted bolt head next to it with that type of copper gasket but it's not in line with fuel inlet.