Awesome picture, but wouldn't Vader have mechanical bones in his arms, instead of organic bones? That is, unless the technology advanced as the years went by and he could have a mechanical skeleton that closely resembeled normal bones...?
Well, from what I recall at the end of Episode II when Anakin and Padme are wed, Anakin has a mechanical arm that highly resembles the structure and function of the arm and hand bones. So I kept it to that structure. You certainly have a valid observation, though. Thanks for mentioning it.