I started this around 2 years ago for a UK Star Wars fan film some guys I vaguely new were making, anyway nothing ever came of the project and it got shoved to my spare drive to gather virtual dust. Happened across it the other month while looking for something else. It was designed to be a battlestation but a fraction of the size of a Death Star but still big enough to pack a good punch.
One of the guys on Sci-Fi Meshes forums said it should be called the "Giant Hurt Ball" :)
Here's a picture to show the scale compared to the Death Star from Star Wars