So you could do it just like the ringworld construction mods do it , give your construction ship a new type of station to build , when it ' s built , trigger an event . I think it ' s onshipconstructed or something , and you limit it by your station shipclass . You could even make the event that fires a popup event , and give different choices for placement . As far as placing something on the galaxy map , again , ringworld construction is one mod to look at , I think it uses a distance and angle as parameters ? As far as the station at the center goes , you could always make an invisible star class , just no texture , put that at the center , and use the event to create a station in its orbit and set its owner to be you . But i think you could just create a system and put nothing it in , and create a regular military station at the center . Pretty sure you can create ships like that . Also , as an idea , if you put a station in the middle , you could make the system give a passive debuff to ships in the system that ' s offset by the station to prevent them from jumping . That way , if your station ever gets destroyed , ships that jump there will be stuck there until you rebuild it . Would make for an interesting mechanic .