What musical instrument would the Star Wars characters play? This site has some good guesses, er, suggestions. Shown is a Jackson Randy Rhodes signature Flying V in black, the obvious choice for Darth Vader.
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It looks like it could cut through anything, like, say, your long lost son's forearm.
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http://superpunch.blogspot.com/2007/05/3-images-darth-vader-playing-violin-and.html