I love your piece. The only thing that bothers me, and only a little bit, is that the border doesn't have the same sketchy quality as your artwork. It's a little too "clean" in comparison to the body subject matter, at least for my taste. I would love to see the border and background reworked just enough to integrate the awesome textures you have here, with the gears and precision parts, which really give it a lot of character. Definitely stay monochromatic with the border. The body is beautiful!