Hah! This is awesome. My group did the same thing, only cuz my bloodthirsty character ended up blasting his owner, and our droid was sympathetic toward the little guy. We're even using the parts you find on the Fang to spruce him up.
In our game the storeowner offended the wookie and got shred because of it and the mechanic adopted the terrifierd R5 afterwards. But I love the Idea with the parts from the fang. I think I'll give them 7-8 choices and 3-4 Slots in the droid and they'll have to decide.
What's with the challenge dice in the dice pool? That isn't right since the pools should just be Green and Yellow dice (Ability and Proficiency respectively).
Who says that? Also: It's my game, so screw that guy It represents damaged parts in the droid and, mostly, his bad motivator.
So he is
a. Not as capable as he should be
b. There are no yellow dice in the pool so there is always a looming despair if the chars use these skills on him.