Although a Flat Right Shoulder Downstroke rotation WILL cause the Hands to "fire Left" after Impact, it does so at the expense of needing compensations for other critical Alignments.
You don't need to compensate to do this, Daryl. But you need to change the relationship between the pivot and the arms swing. You need to turn more through and delay the #4 release. Or, perhaps, as 12 pc talks about - cover the left arm better with the right shoulder.