Yay!!!
Another fan of Humanx!!
I also worked up the Thranx just after I first read it in ~1987 (I never got the GURPS supplement, nor even looked at it until the mid-90s), although they are the only species from ADFoster's universe I did that for. I placed them in Spica sector, "C" subsector, 0505, 0605, 0607, 0706 (Hivehome), 0707, 0804, 0805, 0806, 0807.
I never moved from CT to any other form... started playing in 1983 and Ref'ing in 1984, and couldn't see why I should buy material that made a historical/current events background I didn't like into an integral part of the rules (no longer background).
I ran a standard "tween 4/5 FW period" Spinward Marches/Vanguard Reaches campaign until the very late 1980s.
Since then, I use a somewhat (but not quite) "canonesque" universe, placed just after the "Interstellar Wars" period, with the "2nd Imperium/Rule of Man" replaced by an extended standoff between the Imperium and the Confederation, with a neutral zone covering some subsectors of Zarushagar (O,P), Massila M, N,O, P), & Delphi (M).
I have this ending in one last, massive, catastrophic war, which results in the collapse known as "The Long Night".
I can't run this with any other version of Traveller... GURPS Trav might do it, but I want to play Traveller, not GURPS!!!