Could be trying to cut it . . . . you got the #4 piece right.
Bucket, you got me thinking as usual...if you are planning to use a specific hinge action to alter ball flight...at which stage of the swing does one's pattern show the fact that you are using a specific hinge?
ie. do all back and downswing looks the same until the hinge? (albeit with the hinge mentally programmed before downswing).
Is the hinge action "supposed" to be evident in the backstroke??
Back on topic...this is one of KOC's great videos... although it does demo a very special musical taste that he has developed! it also shows a great view of accumulator 4 release and the long journey that the hands take whilst leaving the right shoulder behind....right shoulder continues movement but less that during the initial start down. Seems to have very little overlap between acc 4 release and acc 2 release...no? ( at about 1:01 mins)