User blog comment:SupcommMonroee/Suppy Super Post Alpha - The Total Reconstruction/@comment-3155949-20131219025220/@comment-4844180-20131220224851

The main few will be located in the Barren Nebulae (may aswell keep that point in history, it is pivotal to the Nuuska and Estin) which lies just outside of Estin territory, whereever that will now be. One lies within the Zortak system (can't remember the name right now.) Others will be dotted around the place, make them up as we go.

Bearing in mind the Estin are close to 8 billion years into being interstellar (no matter how many cultures they've been through) and that they have been expansive and a mix of other things I think it's fair to say they could have had the time to expand to at least 200-250 (this is going to be like bartering for a systems limit now, I hope you realise :P )