Good to have you on the forums, Qyasogk. As you can see from the number of pages, we are quite into Dave's Galaxy.
As for your idea, I would prefer a border system based more upon the regional government ranges of planets, once they get to that society level. This is because outside of those planets able to support a regional government, any claims you have are hard to effectively cement. Sure, you can send in fleet, but your fleets have to travel for at least a couple days just to get outside the range of the regional government which really limits what you can do to enforce it.
