[Gadgeteer Tom]

I'll try going back to a savegame where I'd just rescued the T'Rang and Umpani from the T'Rang - only this time I'll :
a) Go to Umpani first
and
b) Have the Umpani alliance letter out to shove in Z'Ant's face to start talking to him (although it was kinda fun killing all of the T'Rang, most of their drops were quite ordinary).

BTW - I already had delivered the Mook Alliance and returned the Mook Letter, long before.

Thanks all, for your replys - I'll post how it comes out with my revised plan...