Maybe you can make the beak/top/wings a little brighter gray? They seem too dark when I look at the picture and back. Also, I think you should draw in the little scoops on the side of Iron Tiger, they're on top of the blue sides.
DPActually, I had a chance to fix it up now.
Nice! That's pretty spot-on I can't wait until you do that one twin-cockpit one, I wonder how that'll look