Thank you, Stephen.
Don't forget to scroll down to the right video, as there are several others by AA Brown that may start playing if you don't.
One thing I noticed in the AA Brown CCH video, that is different from others' techniques I've seen, and read about, is that they don't worry about keeping the lid in place on the crucible. They slowly removed the lid in the oven and carried the open crucible outside. Evidently having the (poorly fitting) lid in place until the last second is totally unimportant. This is 180 degrees from what Oscar Gaddy believed and practiced. I'm beginning to wonder if the other variables, such as composition of the charcoal pack, temp achieved, and length of time the temp is held, aren't more important to the end result. It would appear, from this video, that oxygen will not invade the super-heated pack for a few moments, even with the lid removed.
Very interesting.