I hacked my Frankensteinian 2300-style system gen into a flattened Traveller near-star map. It's interesting stuff so far tinkering with the results.
I generated entire systems and chose a) best starport or b) highest pop in case of ties for the representative main world. Subsector A, being out in the corner, has a negative population modifier, so the highest pop is 7 and biggest starport is B.
Starport, BTW, is based both on population and world resources.
To accommodate large "heliox" worlds I had to add new letter values, which gave me some interesting worlds with size B, C or even D. For example, a world orbiting Gliese 810 has a diameter of 20,159 km.
The major edit I will need to make, as I mentioned in the 2300 thread, is for stars like Beta Ophiuchi (KIII), where the original zone markers have since moved.
Figuring out how to label atmosphere in terms of what counts as A B or C, I'm still deciding. With Traveller, it's a little easier to get the letter and then decide what it means, but going in the other direction is tricky.
Worlds on the map below with a blue ring are "shirtsleeve" worlds with friendly-ish blue skies.