I've updated the map of my Hard Space setting. The main change is the inclusion of 9 new outposts to the Trailing. These are Jump-3 from Sol, and thus, per Classic Traveller Books 2-3, the largest ship that can get there directly from Sol without a 6-jump detour in J-2 is 400 tons; the large Jump-1 ships cannot get there from sol at all. Colonization was virtually impossible before TL10 (reached 14 years ago). Today, a few tiny outposts exist in these remote stars.
For a full-res map look HERE.