Ah, Mysterons, another veteran of the Cambridge Course! It brings back fond memories. Are you aware of the CUP course for younger children - Minimus? If you are not, have a look at the website. It is quite briliant. And the beauty of it is that any good teacher with little a Latin, or almost none, would be able to teach it. It should be part of the National Curriculum!
I must defend my comment on the anagram indicators still working as such after the removal of the letter pairs I still think they do work, albeit a little loosely. But I think I have come across looser ones, even in Azed!