The original TOS era NCC-1701 Enterprise. "No bloody A, B, C, OR D!" -Scotty
She's a completely empty shell with the core situated in the center of the saucer, in a position where it can be easily made into the Captain's Chair on the bridge.
Again, this is an empty shell so that you may fill it with any systems you desire, add turrets (or not) wherever you like, etc.
I built her for my own personal tribute to Star Trek 50th Anniversary, but what good is keeping it for myself? Go forth, and let the old girl fly again!