Polygod pointed out that when the placement_ctrl is moved from the origin the roll_ctrl's pivot remains at its original position despite the curve object following along. This can make it rather difficult to use if your placing the rig far from the origin. The workaround for this is pretty strait forward:
1. Using the relationship editor, disassociate the ffd1Set from the roll_ctrl.
2. Parent the ball_ctrl_grp (the group above the roll_ctrl) to the placement_ctrl.
The roll_ctrl will act a bit more predictable. The only issue with this is that the roll_ctrl will not visually deform with the squash controls. Both ways will work, it just depends which way you like better.
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