Return of the gig

Nice model, if you want to upgrade her, second hull layer from ablative armor, thus giving her the same hull look as the Intrepid & Sovereign classes, then steal four Sovereign nacells.

Mount two each, back to back on a pylon, so you can replace the Galaxy & Nebula nacells with something more modern.

Would need a extra warp-core, though.

Want to go with a heavy upgrade?

Use the Galaxy Dreadnought upgrade on her, if modified a bit.