they also used concept art in several other issues of the series , off the top of my head , I remember in issue 25 they used some of Johnston’s Death Star trench sketches for the background of Jorman Thoad’s used Starship lot , in issue 61 , the rebel tech who explains the T.I.E. fighter modifications to Luke and Shira is based off of Ralph Mcquarrie sketches in the art of Star Wars books , and in issue 59 , Lando’s outfit is based off of ROTJ concept sketches . I am sure there are more examples .