[EdZ]

DDL - do you feel the #3 pressure point (and left thumb) 'under' the shaft at end? What you describe sounds like you 'may' still be loading for hitting when you focus on your right side (but not when you are focusing on the left, which sounds like you've got the right feels to me).

In short, the left sided focus you describe 'allows' rotation going back, and proper loading of #2 and then passively #3, but the right sided focus you describe likely is more of an angled hinge - I've been there -

If a left sided focus works for you, no real harm done as long as you are still maintaining extensor action (via 'momentum' if not via right arm).

You may want to try a focus on the entire 'wedges' assembly 'fanning' at startup, which will allow you to get that proper right arm extensor action without breaking down the wedges, especially the right forearm wedge/keeping the bent right wrist.