I swear I'm going to check the ends of these threads first before i invest an hour and a half reading them from start to finish!
Beautiful build. For someone who is not a carpenter, there's some pretty complex cuts on this thing.
Not to be paranoid, but you might want to eyeball where the outside wall meets the floor every now and then to make sure this 3500ish lbs of water and wood doesn't cause any structural issues. Concrete construction or not.