What is the Wrist Cock PERPENDICULAR to? The left arm?
The left wristcock motion works in a very particular plane, working in conjuction to accumulator 3.
At impact fix you set the no.3 accumulator via the hinge action plane relative the clubface position required. The no.2 accumulator should move the longitudinal center of gravity up and down the hinge action plane regardless of what happens with the no.3 accumulator or the shoulder motions affect on acc no.3....
No.2 acc is thought of as a clubhead motion that keeps the clubface undisturbed relative to the hinge action plane you set via fix.