Finally. Man, that took forever. The second draft of Mars actually took longer than the first.
This draft is 73,000+ words long, so I've added about 15,000 words. I expected to add a few thousand--I almost always add material during revision--but not quite that much.
Next up, I guess, is the Kindle edit. Once that's done, I'll send Mars off for beta reading, and then I'll get back to Venus and Mercury.