[O.B.Left]

#2 can not be released before impact because the rifgt arm unfolding regulates #2 release. ?????

HBear

See 10-24. There are in fact three Release Points and all of them are prior to Impact. You are quite right about not letting any of the Accumulators fire fully prior to the end of the Impact Interval. Like the boxer who thrusts through his target , his arm is neither fully extended nor fully cocked at the moment of impact nor at the end of the impact interval for that matter. You must thrust through impact, past low point and all the way to Follow Through. Meaning the Thrust is still being directed down plane and towards the plane line post low point and therefor while the hands and clubhead are moving forward , up and in. Crazy but beautiful. See 1-L-15.

If I understand your note about the "right arm regulating #2 release" correctly, be the Release Sequenced or Overlapped the firing order remains 4,1,2,3. Accumulators can be omitted or overlapped but the order can not change. Typically Hitters use an overlapped, "simultaneous" Release of 1 and 2 while Swingers generally employ a Sequenced Release of same. So the Magic of the Right Arm you alluded is still in effect.