Just found this link done by the designer of the KK-2 board. He's got a bunch of other videos that you might want to check out. This guy is obviously a hard core R/C fanatic. http://www.youtube.com/watch?v=YNzqTGEl2xQ
Excellent video and great explainations of the different settings/symptoms for the PI gains! But what's up with the angry chicken at the end