Nice.
I'm a total sucker for blocky ships and hammerhead designs so I really like ... ALL of this. Just all of it.
With that said, its kinda sad to see the old Rhodochrosite go...
Mind if I throw 3 I.D.E.A.S(tm) at you to see if the old design can still see use?
I.D.E.A.S(tm) 01: Simply downscale the image a bit, remove most of the gun mounts and basically use it has an Atlas reskin? You would then have the Cobble for small time hauling the old Rod for big hauling and then the new Rod for epic hauling.
I.D.E.A.S(tm) 02: Remake it into a carrier! I mean that's an awful lot of runway on deck with a crazy amount of fighter storage underneath. Cargo ships being repurposed into carriers is totally a thing that both has been done and works.
I.D.E.A.S(tm) 03: The ultimate utility ship! A.k.a an upscaled Colossus(XLU). A capital ship with High Res Sensors, Survey Suit, and Salvage Gentry at least. Maybe the ECM and Nav stuff too but not sure if that would make sense. If you go this rout you would then have capital ships for all of a captains utility needs. (Cargo, Fuel, and Utility)