This is the same fortress done by  Marc Zirin   (http://marczirin.com/skyrim-modding/), however I have added and changed quite a bit to the layout and npcs.

I have added well over 30 new npcs. Rebuilt the main hall and upper levels as well as the bedroom. Over 45 packages have been added.
Of these npcs 5 are merchants. 15 are guards. 10 servants and many many more. Mechanical spheres and others have also been added.

There are many many more changes which have been done. 

I have thoroughly tested this mod and I have no bugs. but by all means please let me know.