Control Curves

Mirror adjusted control curves from one side to the other.
Mirror
Mirror the shape of control curves from one side to the other.
Mirrors the shape of the control curves from left to right or vice versa

After you created the AdvancedSkeleton, you might find that the control curves, are not ideally scaled/positioned for easy selecting.
So you might have to sculpt the curves (by moving/scaling the cv’s) to fit better.
This mirror tool allows you to do the adjustments on one side, then mirror across.