Very nice write-up Tom.
There are a few minor things I do differently, perhaps they are wrong, or perhaps they are useful to consider as alternatives.
I don't stand astride my CB, but to windward of it, and I also don't luff for reefing, but
heave to. (That's worked for me at least for putting in a first reef - which is all I have installed at this point. Don't know whether this would work when the time comes for a second reef).
Heaving to is great in that you can (and should) lash the tiller (or use a bungee) all the way to one side, and after the boat settles down there's no pressure on the main and the boom is stable and angled away over the leeward side of the boat.
I've used reef hooks on larger boats I crewed on and they are nice and quick. However, looking at my gooseneck, I don't really see how I would fit one, so I went with reef lines instead. My sail slot right above the boom has an opening so the bolt rope can be fed into the mast track. That makes the bolt rope insufficient to counteract the tension of an outhaul or reef line.
The tack is held by a pin, that would work for the non-reefed case. For the first reef, I've relied on the reef line for holding the tack in position, as it attaches fairly far forward on the boom and when cinched tight, there's no a lot of movement possible. However, I have experimented with a tack line, or better, some of my crew did, to make extra sure we could get a flat sail.
I've sailed a DS II that had provisions for a triple reef, and as I recall we sailed most of the week under single or double reef. I don't recall the details of the setup - we tended to start each day reefed and if the wind didn't build as expected, we might let out one reef or the other. I hear that some years, people in that event do use a third reef in earnest.
For everyday stuff, I've done well with a single reef, I tend to sit out the real blows unless I have excellent and experienced crew (and enough of them for more ballast!)