I'm not ENTIRELY happy to have you so close to my expansion area in the core, its true.
Does anyone use Slingshots? The upkeep seems rather expensive. I could see using them on my few core high production military planets but other then that I don't know that they are worth the cost.
I've got them on a few planets. Mainly ones that my merchants visit often.
At the moment I use routes to delineate the border
I use routes to point to other BM players' home planets.