I'm hopefully getting a full on packet with all the math functions sent to me soon. I have similar questions about the math pack surrounding their PID systems. I want to try to implement Ziegler–Nichols solutions as a base method, but the system is so dumbed down I can't really jiggle the key's enough to do something like that without getting some more information.
Re: PID - It would be useful to know how much lopass filtering the 'D' term has, and how the 'I' term "windup" is addressed (e.g. how it gets reset, is its value limited, when does PID go active in boost control).