All you have done is make case that his right hand may not have been directly on the path from his neck exit wound to JBC's right armpit. We don't know exactly where it was in z222. So it is a conjecture that at z222 it was not close to the position seen in z224. But that was not the point I was making. I was making the point that the trajectory still doesn't work. "Even if the tumbling bullet was able to somehow miss striking JFK's hands..", the trajectory to JBC's right armpit is left to right whereas the bullet path is right to left.
Yes, we don?t know exactly where the hand was in z222. Which means we can?t use the hand position to rule out the SBT.
However, a higher hand position at z222 is a more likely position than the z224 position. It is unlikely that JFK was waving at the crowd. Lowered his hand down to the z224 position, and held it there. And then resumed lowing it at z225. More likely, he was lowing his hand all during the z220-z225 sequence. Just like he did so many other times during that motorcade.
In any case, no matter what level his hand was at z222, the hand should be too far outboard, too far to his right, to be directly in front of his throat. I?ve tried simulated casual waves and my fingers come up a couple in inches short of being in front of the throat.
I have posted many times various projections from a 3D model that is a 1:1 scale model of the limo and Dealey Plaza. I have also shown in various photos using sight lines and mapping those sightlines onto a scale model of the limo, that JBC is not inboard of JFK enough to put his right ampit to the left of JFK's neck exit wound, let alone the 4-5 inches required. JBC is in the middle of his seat. That fact can be seen not only in the zfilm but also in photos on Houston as shown in this simple sightline analysis
You have a horizontal angle of 13 degrees. My measurements from maps indicated that at z222, the angle should be 8.5 degrees. This would make a difference of 2.3 inches, horizontally.
Also, you have JFK too far inboard. Your diagram shows his right elbow barely reaching the side of the car. From the picture you provide, his elbow extends a few inches beyond. This makes more sense, because if his elbow barely reached the side of the car, it would often be slipping off the side of the car while he was resting it during that last 45 minutes.