Thanks for such a thorough breakdown of the process. We're heading down in a couple of weeks, with fortunately some changes in the entry protocol, so I'll use this as a guide.

I read somewhere in FB posts, and take this for what it's worth, that if there is a flight delay you can contact them and get that 5 day window extended. I hope that is the case because I will start the process on day 5 to give it as big a window as possible to get processed.