Now you've done it Bob. I did forget those photos on your site of my bike. But when I looked at them I remember that these old photos are before I corrected the chain wrap on the rear Tour De France derailleur. The photo shows the incorrect wrap.
Where did I learn this you ask, when I first joined the CR list a fellow member pointed it out to me and sent me some photos. Actually the TDF instruction manual also has drawings on how to properly wrap the chain on the jockey wheel. It looks counter intuitive but is correct on the Helyett photo below. If you do it incorrectly, like shown on my old photos, it will shift like a pig.
I really should send you some corrected photos.
My bike photo
Corrected chain wrap on TDF derailleur