Small engine animation

http://www.youtube.com/watch?v=_GVq9O9mFCs&feature=related

Practicing spline Ik and constraint animation.
-Engine’s from inventor 2009 files(modified in 3DS Max).
-Gears and chain drafted and modeled in Autocad 2009.
-Final assembly,Ik,constraints and rendered in 3Ds Max 2009.