Ok I got another question that I need an answer to. Please help if you can.

In A New Hope at the very first of the movie where 3PO and R2 land on Luke's home planet. (Even though he wasn't born there.) You can see that 3PO has one leg that is silver when the rest of him is gold. It is his right leg I believe. You can see it in the picture here. Well anyway, does anyone know why his leg is like that?? Did he loose a leg somewhere between Ep.3 and Ep.4 and have to replace it with another one? They even have a action figure of him with one leg that is silver. But I have never heard of how he got it that way. Because in ROTS it is gold but when ANH comes along it is strangely changed to silver. If anyone knows please let me know.