Well, I did it. Went over the 50k mark at around 3:00 this afternoon. Go me.
Going to continue adding to the word count over the two remaining days in the challenge. Then I'll let it sit (probably until early next year) before I start what I know is going to be a rough and tumble edit.
In general, I'm pleased with what I've got, but there are some interesting logic flaws in the story's time line that should be quite a challenge to solve. I also I have a sneaking suspicion that I may have one or two more main characters than I need. Anyway, I'll deal with all after I've had a chance to rest my critical eye.