Okay, here's something I've always wondered about. Why does C-3PO have a metal segment connecting his mid-forearm to his mid-upper arm? What practical value could that have given that it would limit arm movement so substantially? At first I thought it was because Anthony Daniels was so weak in his biceps that it would be awkward and clunky when he tried to move C-3PO's heavy metallic forearms, but then I realized to fix that, all they'd have to do is make the arm so that it's fused at the elbow (a top half and a bottom half that Daniels would put his arm in as if they were sandwich buns & then they'd screw the top and bottom halves together, enclosing his arm within C-3PO's arm.) So, now I can't think of a real-world practical function or an in-universe function for those little metallic connecting segments. Can anyone explain this weird little detail about C-3PO?