You are apparently implying that if the right shoulder is doing work, that it turns a three barrel hitting action into a four barrel hitting action. However, doesn't that work have to be defined in terms of further PA recruitment/involvement in the hitting action - turning a 1:2:3 pattern into a 4:1:2:3 pattern. Are you saying the right shoulder's active downplane movement releases PA#4 via a pivot-action and that PA#1 then becomes operant?
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