For starters, a Hand has Only 1 Forefinger. You claimed the Thumb was "INSIDE the cranium". If you are sticking to that, then this missing skull/cavity in the Top of JFK 's head would need to be explained.
You can't see there's a gaping hole in the skull where the thumb is? The opening goes from above the right ear to about the apex.
That's how I see it and how the HSCA depicted it. I don't what the heck you're seeing.
Also I don't see where the hair is being pulled or scalp held up. I think the scalp was generally attached near and below the skull in-shoot until reflection.