What main topics and stories does Chapter 51 of the Sai Satcharitra introduce to the reader?

Chapter 51 of the Shri Sai Satcharita serves as an introduction to several key narratives. After its opening invocations, the text explains that it will narrate the marvelous account of how Kakasaheb was established in Shirdi, exploring the history of his past-life bond (rinanubandh) with the town and his firm relationship with Sai. As mentioned in this chapter, it also promises to tell three stories concerning three different devotees, which are intended to soothe the hearts of the listeners. This is preceded by a philosophical discussion on the destruction of delusion, drawing parallels from the Bhagavad Gita.