You are looking at it wrong. It's an axial rotation that you need to consider. That being around the central axis of the body. Connally's center axis is where his sagittal and coronal planes meet. The spine facilitates the rotation, along with the hips, but the rotation itself is around that longitudinal axis.
Nope. When he rotates so that his upper torso is 30 degrees right of center, he moves the entry point on his back more than 3 inches to the left. Here's what it looks like with the entry wound at 7.5 inches to the right of the midline of his back:
Assuming the thickness of Connally's torso to be 9 inches from anterior to posterior. Using that number we get a distance of 4.5 inches from the center axis of his upper torso measured straight to the midline of his back. If the wound is 7.5 inches to the right of the midline of the back then the distance from his center axis to that point is about 8.75 inches.
I don't know who rotates their torso other than from their spine. If the spine rotates around some notional body axis, then the spine would have to physically move laterally every time we turned, which means that the hips would have to move. I can easily turn my torso sitting down without moving my hips at all. Perhaps this golf video may help you see how the spine turns. It is called: THE GOLF SWING MADE SIMPLE - TURN AROUND YOUR SPINE:
What you need to do is show us a video of someone turning right 30 degrees from forward and show us how their right shoulder moves left 3 inches.
You don't have a point. The point that you are attempting to make is invalid.
It is at least as valid as your point. You are cherry-picking the ITEK data and saying that it means JBC was 20.3 cm inboard of JFK. ITEK really said that they could not tell for sure but his midline was somewhere between 10.2 and 20.3 cm inboard.
I am just saying that:
1. suppose he was closer to 10.2 cm inboard, say 13 cm (5.1 inches). and say
2. the first shot struck JFK in the neck at z195 (which, unlike the phantom missed shot at z155 or so which no one observed and which conflicts with at least 3 large bodies of mutually consistent evidence, fits the evidence) when the angle from the SN to the car direction was about 13 or 14 degrees.
Then the bullet through JFK's neck crossed the plane of JBC's jumpseat an additional 14-15 cm further left. If JBC's spine was 13 cm left of JFK's then the bullet would have passed to the left of JBC's spine by 1-2 cm. But at z195, JBC was turned so the plane of his back was aligned generally in the same direction as the right to left bullet path so the bullet would not necessarily have struck his back. We know it didn't. But that was not the only part of his body that was on the left side of the middle of his jumpseat. And there was a wound on his left side. What is "invalid" about that?
The SBT tries to drive a square peg into a round hole. No one said it had occurred and many said it didn't. There is another explanation that does not conflict with the evidence but is still consistent with the overwhelming evidence that all shots were fired using Oswald's MC.