I just have one question on the whole Death Star issue... when do they actually say it is complete? I know Tarkin makes reference to this "fully functional battle station" which could imply that it was just completed (or was that Palpy in ROTJ who says that?). But why do we assume that it took what would actually be 18 years as Luke and Leia are born in ROTS and are 18 in ANH? Maybe it's been done for some time and has been floating about biding its time to make its first appearance. Or maybe they've been adding on or refining it before actually using it? Just some ideas to ponder.