IIRC, I stickied this thread not long after the release. I�d been thinking of having stickied threads for each of the class implementations, as and when threads discussing them appeared. But suitable thread starter posts for other classes either didn�t materialise or else I missed them. (If there are good discussions of other classes that could/should be stickied, do PM me with links.)

"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"