3ds Max Mechanical Rigging - Part 3a: Arg based control of IK animation

This is part 3a of a 3 part tutorial on how to do mechanical rigging for bone animation in 3ds Max. Part 1 covered using the HI IK Solver to animate some landing gear parts. and part 2 covered the HD IK Solver. Part 3a covers the basics of how to setup an argument based controller for IK animation. Part 3b will cover argument based control when multiple IK chains are dependent on each other.