Reddit user SovereignGFC posted a series of pictures of the Star Destroyer of his own design that he calls a Curator-class Star Destroyer. The model is based on some Star Wars fanfiction that he wrote himself. He 3D printed all of the parts on his home-built PowerSpec 3D Pro printer using PLA. The entire project took him several weeks to complete, with the bridge tower back blocks taking twenty hours alone. You can find out more about this 3D printing project over on 3DPrint.com: http://3dprint.com/113144/3d-printed-star-destroyer/