Looks good enough to me, Matt. As for the putty you mentioned, I don't know if you can get it in the 'States easily, but I've used 'Milliput' for the last thirty years or so, and have no complaints. It's a 2-part, and sets hard, sands easily, can be drilled, tapped, and moulded. The standard is grey/green, and there's a 'fine' white version, and a silver/grey version. Generally, the standard is best for model work. To get small areas filled and smooth, wet it when in place, and smooth off. I think the nearest to it in the U.S. is 'Greenstuff'.
Hope this helps.
Terry.