I am sorry to have to relate to our forum members that David Nelson, the author of many editions of the CD Survey and, latterly, the Timeline, died on 2 February. Apart from being a very likeable individual, he had a vast knowledge of Zelenka's music and recordings thereof. Among our circle of Zelenka fans, no-one will be able to take his place. Being an unassuming and private man, he never had much of a presence on the forum, preferring to contribute where he knew that he could make a difference.
So the CD Survey and Timeline as they now stand are the last editions. Please download them and marvel at how much work went in to them, and at how authoratatively they are written.
My condolences to David's family. And thanks to Andrew Hinds (London) for letting me know.