Hey Vertigo, you really seem to know a lot about watches. How about running a step by step pictorial about bracelet sizing and battery changing for the rest of us? I'm sure that many of us would find that very helpful.
I think a step by step tutorial isn't quite necessary, as if you can't figure out how to use the tools...welllll...but I can point you to the right quality tools. For bracelet sizing, you can find them here:
http://www.mywatchmaker.net/watchmakertools.htm . The Bergeon Spring Bar tool and the Bracelet Sizing tool are the ones I have. They're not cheap and may not be worth it if you only own one watch, but I've tried the made in China variations of those tools and they're terrible (i.e. the cheaper sizing tools have a lot of play at the tip, making it hard to aim it right into the bracelet's holes; the Bergeon one is much tighter and more precise, this is especially important when you're trying to drive pins back in), so it's worth paying the extra. For the caseback opener, that I just got a cheap one $15 one off Ebay, as there's a considerable price difference for a good one (~$45 for a good one). You'll also need a small hammer, the smaller the better, you'll need it to hammer pins back in before finalizing it with the bracelet tool, as well as a plier with teeth to pull pins out. I'm a watch guy and own multiple watches and am always buying/selling watches, so these tools are easily worth it for me. It's nice getting a new watch and just being able to adjust the bracelet VERY CAREFULLY at my own leisure until it fits. My friends all like to come to me nowdays to fit their bracelets as well.