I can't help with your specific question, Kev,
(I don't know how to do that) but I sure like what you have so far. Well done.
I would try for a little more separation between the plane and the sky. Even though you made the BG black and white, the plane is so pale in color, it blends right into the grayscale sky. People know what color the airplane is supposed to be so you can't screw around with it much. Maybe a darker sky ??
Rusty