User blog comment:Obsidion Darkhart/Rank 4 hull upgrades... With fury broadsides!/@comment-3115143-20111016013952/@comment-1997676-20111016014733

No, rank 4 is the final upgrade, and you can only get one upgrade in the S&C/Firestorm/Fortune tier. Sadly...

The "-60%" is just the change compared to my previous hull. That was cargo rank 3, which has 160% hull capacity.