I think the Reboot-C would be a pretty big challenge, judging by the "spine" that runs through the centerline of the hull. It begins as being recessed into the saucer, rises up like a dorsal ridge over the engineering hull, then recesses again to the sunken shuttle bay. Beautiful from a visual standpoint, but I bet modelling it would be a gold-plated bitch.
So - who's up for it?