Here it is in a nutshell, thanks to a V1 with @Tom Saguto. Caught it on a new vid, in my backswing the trail arm is rolling off, taking the club out of the shaft plane, and opening the clubface to the downswing. All of which brings in the arms and hands on the downswing and sends the ball way right. I'm interested in others experience about how to "feel" staying the shaft plane in the backswing, what's involved for you? @danny , @James Flood , @Alan Studnicky , @Thomas Linehan , anyone else who's been involved with my other recent posts. Also understanding that everyone is different, of course, but right now I have very little to use in feeling this right. Especially in terms of how to keep the trail arm up without losing the connection.
Well then @danny, here's the result of about a month of solid persistent effort. Also taking in your comment here and @Tom Saguto 's suggestion above to review the Problem #2 Takeaway drill. And then only after an hour and half with time to spare and no pressure to be anywhere else, using alignment sticks galore for most of it until the very end here, and taking plenty of time on each swing and between. And insisting on doing everything with different clubs, starting with a 6-iron and then a 3-iron before the wood - so as not to get suddenly intimidated by the big bad ones later on.
Still working on that trailing arm and getting the shoulder down. But always end your range session on a good shot.