I'm trying to set up a game with the player as a vast galactic power, and multiple NPR allies within your territory, who can expand and potentially war with one another or threats beyond the player's borders. However, it seems that I can't get an NPR to be ok with a colony in their home system, even when I set/fix the diplomatic rating at 10,000. Is the DR setting only my attitude towards them, or is it just that nobody wants aliens in their home system? Would this idea work, or would there be territory disputes between the player and NPRs despite being allies?