Since you ignored my last questions, I fully expect you to do the same with this one, but, despite the fact that IMO it has very little to do with CE399, I'm going to ask it anyway.
The trajectory from the SN is what is critical.
What makes you so sure that the shots came from the so-called SN at the TSBD?
Not sure what questions I missed? If I missed responding just send me a reminder and I will respond.
First of all, the trajectory has everything to do with CE399. The path through JFK's neck into JBC's thigh, butt-first, explains the condition of CE399 (as well as the first shot hitting JFK and the second hitting only JBC, the 1.......2...3 shot pattern, Tague's evidence, Greer, Hickey, Powers, Gayle Newman etc).
As far as the evidence that the shots came from the SN there are several witnesses whose evidence puts the shots originating there: Robert Jackson, Mrs. Cabell, and Amos Euins saw the rifle in the window during or immediately after the shots. Arnold Rowland saw a man with a rifle 15 minutes before the shots. The three men below on the 5th floor heard 3 loud shots from above them and Harold Norman heard the bolt action operated 3 times and heard 3 shells hit the floor.
Furthermore, the rifle found on the 6th floor had fired CE399. There were boxes in the SN placed in an unusual way consistent with use to support a rifle. Most witnesses said the shots all sounded similar and almost all witnesses said the shots sounded like they all came from the same location (although there was disagreement as to the location of the source).
If that's not enough, let me know and I will refer to more.