I dig it. I could see, if the Galactica reached Earth in the 23rd century, I could see it being upgraded by Starfleet. Also, I could see this as a deep space exploration ship, possibly one not intended to return to Federation space, a sorta colonization ship, maybe.
Just how big is that thing, anyhow, and how many people can fit in it?
Want a challenge?
Try making either a Millennium Falcon, Star destroyer or Corellian corvette in Trek form.