...but re-using the Death Star in Return is .... a poor choice. If for no other reason than I once had a friend who had the interesting belief that the Return Death Star was actually the rebuilt ANH Death Star, a belief that he would expound upon loudly and vociferously in direct proportion to the amount he drank.
Hm. Interesting interpretation. I mean, it is a completely irrelevant interpretation - where they get the parts and materials really doesn't matter as far as the plot is concerned.