Make a modifier follow at 50%

I want the pJCMFlexCalf_L and pJCMFlexCalf_R modifiers of a Genesis 8 figure to only follow at 50%.
An example: When I bend the right foot to a value of 65 the pJCMFlexCalf_R modifier should then be at 50% instead of 100%. And when bent to 32.5 it should be at 25% instead of 50%. And so on. :P
Is this possible? I know I could just adjust it manually every time, but that would just be too much work for my purpose.
Regards,
Binkz
Comments
You could edit the scalar in the Proeprty hierarchy for the link - if you right-click on the Parameters pane and put it in Edit mode you can then right-click on the morph slider and select Show in property hierarchy, then expand to show controllers>1st stage>the bend>Attributes, then adjust the Scalar value. save as a new Character Preset and use that to load the figure, or save as a scene/scene subset.
Thanks Richard, that works wonderfully!