The SBT is the only plausible explanation ever offered for JFK's non-fatal wounds and all of JBC's wounds. On countless occasions you have demonstrated how ridiculous alternative theories can be. It is preposterous to think that the bullet that exited JFK's throat could have missed JBC's torso and even sillier to think it would have entered his left thigh even with it flared out in as unnatural position as you have tried to demonstrate.
It would be silly if I suggested that the shot through JFK happened at z223 or thereabouts. But I do not suggest that at all. The evidence indicates that it was the first shot and it happened earlier:as JFK approached the Thornton sign (T.E. Moore), an instant before z202 (Phil Willis), just after Betzner took his z186 photo, enough after Croft took his z161 photo for him to wind his film, as JFK passed between Linda Willus and the Stemmons sign, etc. And at that time JBC’s torso was turned to the right. What does not work is any shot through JFK’s neck striking JBC on his right side.
It is even more ridiculous to postulate that JBC was not shot prior to Z270, given the extreme gyrations he exhibited prior to then as well as his sudden arm flip at Z226 which perfectly coincided with JFK's sudden reaction to being shot through his upper back and throat. At least you have tried to offer an alternative, lame as it is. The CTs almost never even try. They just declare the SBT impossible without saying why or even attempting to offer a plausible alternative. They seem to know that there is no alternative that wouldn't be easily demolished as yours has been.
You seem to be ignoring the evidence of JBC that he turned around to look back at JFK, which was after the first shot and before he was hit in the back. That is the only time he turns to look back. You also seem to be ignoring the evidence that JBC’s doctors concluded that his chest injury was sustained when his chest was almost parallel to the trajectory if the bullet.