About this 3D model

This is my first model for my Maker Bot Replicator 2. Its a tall building, composed of one base, one anex, a roof, and modular floors, so it can be as tall as you want (minimun of 6 Floors to fit with the anex). I built it in separate files, because its meant to be printed without rafts or supports for material and time saving. The pieces should fit together, howerver some sanding may be necesary. Any input or corrections are welcomed and I will try to fix any problems encountered, I have printed this for myself and works pretty ggod, however I did require some sanding on the joints of the modular floors so they would fit seamlessly.