I'm guessing you used this as your main reference? For whatever reason the bow is on the wrong side in that picture. This is what I came up with after more editing. I tried to edit one of your heads, but I just like the one that I had better, sorry.
About the banding, my main reference was this: As I look at it now, though, the shoulder shading doesn't follow a perfect line like I thought it did. whoops.