Director's cut: A Giant Adventre to Equestria, chapter 12 · 6:22pm Jan 22nd, 2019
Chapter 12 had no changes at all before and during writing it, and while editing it, outside of fixing grammar mistakes I found. It barely even needed fine-tuning during the editing part.
In fact, out of all the chapters, even chapter 1, chapter 12 had the fewest changes, before and during writing it, and while editing.