I edited for four hours today and got the penultimate chapter done. For something I had to pretty much construct from scratch, it was surprisingly painless. Someone once said that a story is like a funnel, starting at the wide end with all kinds of possibilities; by the time you reach the end, there are only so many choices you can make. This was the "tying up threads" chapter, and I could see what threads needed to be tied.
I've done about a third of the final chapter. I'm guessing it'll be about 2-3 hours of work. I've got an hour now before I have to bring The Son to a Cub Scout cookout, and then I'll do more after he goes to bed.
I'll post again when it's done... even if that turns out to be tomorrow.