Thank you for the advice and the convenient links. I am currently on a AP V2 but am looking at converting over to open source. Haven't had much of a chance to play with the AP yet but it is pretty high up on my list now. Just want to start to get used to data logging and what not. I don't know near enough and would not be comfortable even thinking about messing with the actual tune just yet.
Looks like I'll have a couple of books to kill my flight time with now.