The conclusions ??
A [roughly] frontal shot WAS possible [and easier] from the "grassy knoll"
BUT the [visible] effects did NOT match the Zappruder film [not even close]
AND, this shot WOULD have KILLED Jackie [NO doubt at all, about that]
Decades of gun use and especially experience with a Carcano, had already convinced me of the ballistics but I never even knew what the angle [from thec grassy knoll] was
NO other frontal shot was really possible from ANY place that offered any concealment - without shooting through the windshield.
The results from the same angle and distance as the 6th floor ??
Almost identical to what you see on the Zappruder film
CASE CLOSED
Not quite
As far as WHERE the shot came from ? Pretty much
As to WHO shot it
That is still debatable
Watching things you NEVER knew [or saw] before was fascinating