As you can see in the Movie Pic, There's a Gadget coming out of R2's wide door to the right of the vents. Now I have no idea what this thing is called and I've never seen anyone else build this part, So I'm giving it my best shot. I started with some circles I cut and then skinned them with Polystyrene. I had a few junk parts that seem to give me the basics for the gadget.
It's in the rough stage right now and I'm still not up to speed after the surgery, But I'm trying to get back to normal.