The Spine

I used a spline as an IK for the spine and used clusters at each joint. I made upper and lower controls for the back and under the hiearchy put the upper control under bottom. I also added the twist attribute for the spline to the upper control on the rotate x attribute so the spine can twist. I kept the colors yellow since they are center. I put the lower control for the back on the back and customized it a little since it was overcrowding the hip/root controls. This made it easier for it to be selected.