rigging tutorial part 3: auto clavicle switch FK IK

this is my first rigging tutorial: part 3 here im going to explain how to create auto clavicle for the arm and how to switch between IK and FK thie tutorial is for 3dsmax but you can easily apply to any software if you have basic rig knoledge also i really would like to say thanks to Paul use his dvd to improve my rigging skill. if you are intrested take a look at his web site