Is the black wrinkle paint on the cylinder cover original, or did you re-paint? It looks good. As far as I know it should be that color and texture.
Is the high tension coil (brown Bakelite) working? I tried to get one to work on my GS160. Now I've got four or five of those brown coils, a couple original and a couple reproduction, no luck. I finally gave up and put a Taiwan made coil on that is super reliable.