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Hi When you use this script the resault will be a spherical shape curve that is geometry constrainted to the defined curves and an implicitBox that is the same. The sphere is parented to box so you can use box to set driven key and then use the sphere to animate by hand on top of that. There are little red dot shapes, these are small locators that can be used to change the shape of the predefined curve. I developed this script to use the curves that was on top of anatomical facial muscles (no muscle geometry) so that I can use the spherical curves as wire deformer, this way I can have muscle deformation in facial setup easily on top of blend shapes that brakes the linearity of blend shapes animation. Have fun