So close now. I didn't manage to finish the rough draft this weekend, but I got about 7,000 words into the last chapter. Two or four scenes left depending out how you count them, so maybe another 2,000 - 3,000 words. Action always writes fast, and the last chapter is constant action.
I'll probably split the last chapter when I'm done with it. I've got a great spot for it to break. After the chapter a 1,000 word or so epilogue and rough draft will be complete.