Thanks for the photo. I was wrong and am happy to be corrected, it doesn't mean that my sun plane physics were wrong just not right for 1963, but it pales into insignificance to the following
"Theory Destroying GIF".While calculating the position of the center railing I realized that from all the front angles of the TSBD I could find, that the top post of the railing when extended meets the light above virtually dead center.
Now when the perspective above is applied to my super duper GIF, by dropping a plumb line from the center of the lamp we see that the railings positions are accurate but my original lengths were both a bit too long so I "painted them out" and even digitally it ain't easy to paint stuff out. Anyway we see that where the railing finishes is behind "the lady in black" and Oswald is off under the shadow.
JohnM