[Martee]

Your description sounds a little like what I had experienced.

I was doing the back stroke using the shoulders and got inside.

Cure for me was..

1. Line the rt Forearm up with the clubshaft at address
2. Trace the Plane Line (line on ground that extends backward from the botton of the Inclined Plane).
3. Tracing is done by right action, not shoulder action
4. Apply right arm extensor action
5. If a Hitting stroke is to be done, the then a one smooth rotation to the top, if swinging is to be done, rotation should be completed by time hands and club are hip high.
6. If I am hitting my hands finish at the top at right shoulder level, if I am swinging my hands finish a bit higher. (Hitting is a flatter plane, Swinging is a bit steeper).
7. From here is is a matter of using the correct delivery path/line to get the club back to the ball.

Sounds simple when I read it, wish it was that easy for this old body.

Now all of this was to accomplish a zero shift.

You have described a double shift, first shifting during the back stroke from the elbow plane to the shoulder turn plane and then returning to the elbow plane on the down stroke. John Dunginan advocates this method. You can get some tips on his site about how he iniitates the down stroke.