Only one source does *not* have the white border, and that is the profile I posted for comparison. All others, including scale model decals, and even the later model with the yellow cowling all have a white border. So I put it in.
I'm worried that maybe the greys are a little too light. I have a B&W picture of the real deal (the one with the yellow cowling) and it's not such a dark color. The colors are all rather light, despite the picture's contrast being too harsh.