The g descender is nice but a little thick for my eye

I am going to have to agree with Hector about the g.

Have you thought of drawing the stealths as vectors? Sometimes photos on tshirts look kinda funny imo.

I do like the composition of the planes though, how it gives the feeling of one being under the other.

I don't think you should outline that mark in the background. simplify it and it will act more background and less like it is trying to be the center of attention. I guess my problem is hierarchy, there is not enough division.