Better than your first... but there are still some bugs.
- The mixing of styles; knights don't really fit in a sci-fi setting
- A little too much copy/paste here and there. And you haven't checked for brush misalignemt after doing it...
- Lighting.
....And did you get that "Engineering" part from 'Galaxy Quest'....?

Anyway, more polished than your first. As expected. Well done.
Thanks for your work, and thanks for sharing!