This is an awesome project. Aren\'t there ships bigger than 1.4km out there? I think a space station that size could be doable... I hope so anyway! Even if it isn\'t quite to scale, it would be neato. Can\'t wait to see further updates! :D
Also FYI you could do like the maker of the minecraft DS9 and voxelize the model. There is an editor being developed where you can import the voxelized model and turn it into a blueprint. Dunno if it could handle something that large, though, of it it could turn it into an importable space station/sector. Here is where you can find it. http://star-made.org/content/offline-ship-editor The editor is actively being developed and the developer takes suggestions.