Things I think that need fleshing out include:
- The Dictator of the Belt.
- Some Lieutenants, most likely the Commander of the Secret Police.
- Some Rebels, both Contacts and eventually some Leader types.
- Guards for the Depot.
- The Depot itself.
- Some various NPCs of the general sort.
- Encounter Tables, for all locations; Starport, Depot world, Space, stuff like that.