For Kaut, why dont you make them a faction. Make them hate everone and give them a ton of ships. Dont give them a Galactic AI, so they would only exist on Kaut and would defend the planet at all times. As Kaut was never owned by the Empire, and actually had Rebel leanings. But Kaut of Kaut knew that to join the Rebellion was to be the destruction of Kaut Drives Yards so he was the main military supplier of the Empire, but he also sold ships to the Rebellion although discretly. It wasnt until the treaty that they came fully under the Rebellions juristriction and produced ships only for them. Plus Fondor and Kaut each built an Executor-Class Star Dreadnought at the same time, commisioned as the Lusankya and Executor therefore it is illogical to need both of them to build a Executor.