Torso Spline IK Rig? I am looking for a tutorial :)

Hello, Blender Community!

Is it possible to create a Torso Rig with the Spline IK?
Most Tutorial I’ve seen on Google and Bing are Outdated with the current version of Blender 2.78. My question is about how to rig a Skeleton/Armature with IK Spline.

I am attaching this Rig of a Torso Spline IK with Twist in the Y Rotation (I cannot say that this rig is perfect).


untitled.blend (619 KB)