I'm still working on revising chapter 4. Just as I think I'm done, I think of something different/new/better to do, causing me to rewrite the whole chapter. I'm on my fourth try, and between that (all the tries) and taking care of the baby and now housesitting for my in-laws (making it so I also have to watch their dogs and cook all my meals), it's taken over to months. Kind of pathetic, actually. But at least I see the end (finally finishing chapter 4) in sight. Though when I went to type up the new scene 1 of chapter 4 yesterday, I realized that I still have some changes to make.
On the plus side, this whole writing and rewriting of chapter 4 has forced me to learn/discover/figure out more of the nit-picky details of my world. The downside is that those details don't always show up at the best time, causing me to rewrite the chapter yet again to include them in their proper spot.
Oh well, I just have to keep telling myself that the end product will be worth it. And that even if ultimately those details don't make it into the final draft, I still know them so it makes the world that much more alive for me and hopefully, eventually, that much more alive for the reader.