Although I have to join Luke in his comments, I have to say I like the cleanness of the build. It's a very nice and shiny build. Its appearance and the lack of accuracy gives me the impression it looks more like a toy than a real space model but the result and its size are nonetheless admirable.
There are some really good (free) designs of shuttles around on the web, perhaps you could try and use them for more references to build in that enormous scale.
I like to see with what you will come up next.
- Dij t dut mout t waiten!