This is best viewed from a distance. What I mean is, you shouldn't look at it close up. It's great to look at this and see it build up to having more form. You can see the actual machines in this. There are so many things sticking out in this. I'm not even quite sure if it's one machine.
I think it might be a machine in a place of weapons. I think the sketchbook background works better here. I am wondering how you succeeded in those classes. This seems too complicated to make it in a class! It's just a wonderful picture.