#15 Is really neat. I'm not a fan of the birds head even though it looks neat I just don't quite think it fits the bill. Maybe it could be replaces with one half of a propeller blade or something? I'm just throwing ideas out! It looks great otherwise! I also prefer the grey lines on #15 better than not. Thanks so much for contributing! I've left the sister to this one out of the rankings only because it doesn't have the accent lines on it.