I'm willing to allow Darius to use intimidate to haggle for starship components, but he can't apply his +10 bonus to acquire starship weapons.  (I'd let him use Common Lore (War) to find them too, though)<br/><br/>As for Universal Weapon Training (Tau), you can get that one for 1,500xp as an elite advance, or 1,000xp in place of an exotic weapon proficiency for a Kroot.