This is a great looking piece, your style is coming into its own, it only needs minor improvements in ambient detail and shaping and you will have a 5 star worthy piece. The features are much better than an average piece of its size and aid greatly in its overall functionality.
Honestly, I am quite bad in exterior design and, therefore, I was quite exited when I stumbled over Tsharas blueprint of the asteroid field. To dig a base into an asteroid was something I had in mind for a while, but I was not capable of creating a good looking asteroid in the first place. ;)