Here's roughing in of CJ's chest...
I have some GREAT shots of the Weta maquette, which should, in theory, be OK after reading in The Art of District 9 that the major differences between the CJ maquette and the finished CG CJ were all in the face... however some of the screen shots seem to contradict this. And then of course the problem with the screen shots is that they're often blurry and CJ's t-shirt obscures any details.
So I have no choice but to more or less follow the Weta maquette... but we'll see how happy with it I am, the further I get.