Are you folks talking about this tutorial: https://www.simplymaya.com/movie_page...html?tut_id=47?

I'm considering buying it. I have Maya PLE 5, the version that came with UT2004. I found another brief tutorial on the web (CharRig101-JakeCallery.pdf) that helped me build a decent foot control with some set driven keys. What it provided was a step-by-step process, but I didn't really get a good understanding of how IK works under the hood and how I could apply IK to other things, or extend it beyond what was in the tutorial.

Does the tutorial above get into the hows and whys? If not, can someone recommend a tutorial here that does?