I've been working with the APCD for 6 to 9 months now, and I just found another set of instructions/explanations. They've been available for a while now, but I didn't know it. Knowing more about the APCD can only help, and this one has some good stuff!
Art released this for about 10 dollars back in the day . I can't remember how much it cost in sterling, but it was extremely good value. I think I spent more in paper and printer ink making a hard copy!