Regarding Tamiya's Gullwing heat shield: I have most of the Gullwing kits out there, in all scales -- Italeri, Minicraft/Entex, AMT, etc. All of these either mold it like Tamiya has, or omit it entirely. Oddly, the only kit that has it as a separate part is the lamentable 1/12 kit by Renwal and Revell/Monogram. I don't see a problem with just scoring more separation on the edges of the heat shield. In addition, it can be seen on more original cars that the heat shield is a bit shinier than the dull manifold, which should not be polished (Bill's photo looks a bit over-restored), so there's another way to differentiate the parts.