Nice expression and muscle definition^^

I took a look at the challenger badge, and it looks great! I hate to say it, though, but this seriously looks rushed... I understand the situation you're in, but when you're asking for a large number of commissions, I would still be annoyed, comparing this to your other recent works. I'm not saying go for perfect, but do try to get the sketch looking good.

In terms of this picture: Wings (they've got solid bones. It looks flat, with random thickness of black lines), and words (there's no uniformity in thickness of lines, so it looks rushed).