Ok When I've connecting the r_noFlipLength_Mult to the noFlip leg the translateX values go to zero and the leg shrinks.
When looking in the hypergraph, there the animCurveUL that feeds into the blendAttr(r(r_noFlip}_lowLeg_joint_Elbow...) that connects to the r_noFlipLength_mult is translateZ and not translateX. Would this be the problem? Any suggestions?