Conclusion for me at this point is that Oswald was not on the 6th floor after 12:00 and that the rifle displaying person Arnold Rowland saw for only a few seconds at the SW 6th floor window , had originally intended that window. This shooter had not yet set up the SE window ledge box and did not do so until very close to 12:25 after he changed his plans and decided the SE window was the better vantage point.
There reason to change to the other window does necessarily have to be a BRW or any other person on the floor. It could just be the shooter thought the trees at the SW were too much of a potential LOS obstruction.
I don’t see the need for a 2nd shooter unless one of them was trying to shoot using the MC rifle to further set the frame up of Oswald. In that case, a 30.06 precision rifle shooter May have shot the kill head shot at Z-313 from the SW window. The shot would have been fired about 1 sec after the MC rifle shooter missed his 2nd shot, (z285) such shot possibly hitting the curb near Tague( at the Triple underpass)
Walt Cakebread preplanted MC rifle theory is the easier way to do the frame up if it’s just one shooter, so I’m partial to that idea more so than the post planted rifle scenario or the 2 shooter theory.
One shooter with a semi auto rifle is enough. However , would a semi auto rifle make the kind of “clack clack” noise that Harold Norman described ?
Maybe a faster firing bolt action version of the MC rifle like the Cavalry carbine MC , could be fired 3 shots in about 4 secs?
The cavalry carbine version had a shorter wooden stock and about 12” of barrel exposed. Disassembled would fit in a 22” length package because of the shorter stock and barrel length.
The idea of an elderly negro leaning out a fully open SE window at 12:15 seems an odd and unnecessary action by a conspirator. Why risk photographs or filmed, jeopardizing the mission?
On the other hand, BRW was definitely not “bald” nor were Norman or Jarman.
BRW shirt was a solid reddish shirt not a plaid green and red shirt.