Simply fascinating posts here. Very interesting work being done to construct the timeline of the Death Star. Aach was the code name of a special messenger from Bail Organa, a messenger the Alderaanian viceroy used only for top-level Rebel Alliance business -Interlude at Darkknell That concludes that the Rebellion is already functioning according to the observations of Bel Iblis. Later they suggest: Aach looked around the area again. "There's been a breakthrough," he said, lowering his voice to something barely above a whisper. "We've located Tarkin's project." So, they possibly are talking about the DS in IaD.