Yes, I suppose. I have these three mags called the "Technical Journals." It has a listing on theforce.net under short guides, so that proves they do exist. Whether they offical EU or not, I'm not sure there. They came out before the SE and I remember reading about how the sled moved Jabba around because he was so fat. I also know in a diagram for A New Hope they have a schematic of the Falcon that shows where the bathroom is, which unfortunately the Incredible Cross-Sections disagrees with, so we don't know where it truly is.