From Mathew's earlier post "the right forearm is on the inclined plane - which includes the sweetspot at impact for, lets just say a very short time, as the right forearm has a 'cross-line motion' as it straightens. This is due to the right shoulder being above the inclined plane used for release."
This "crossline motion" Mathew speaks of is what I am trying to describe with the discussion you and I are debating. I will try to post some pictures if I can get stills to work from my V1 program