Creative Speculation

Here it is the year 2013 and you are spending some portion of your day defending the Single Bullet Theory. What's next? The sun actually revolves around the Earth? That's common sense too.

"Nonsense. There's an entry wound on the back, a nick on the C6 vertebra, and an exit wound on the throat. I'd call that a pretty clear track."
Your interpretation has no medical-legal foundation. There is a routine understood procedure for forensic pathologists to track a wound and it was not done. Dr Finck was confronted on this point and was forced to admit the autopsy doctors were ordered not to track the wound - as was their professional responsibility - and this order came from a ranking military official.

"I'd say a hole all the way through his body is pretty consistent with a passing high-velocity bullet."
There is no evidence to show a "hole passing all the way through his body". Medical literature studying gunshot wounds which do pass through, especially in the neck area, describes damage in much greater severity than was found with JFK. Mannlicher-Carcano weapons in particular, as described in medical literature, create "shredding" "tearing" injuries in a fairly wide cone around the path. Nothing like that damage is seen or was noted.

FBI records show that CE399 was received in Washington about 90 minutes before the Secret Service guy who carried the bullet handed it over.

"The Lattimer tests showed that if the bullet had been slowed down first and hit sideways, then it could break the wrist bone and come out looking like CE399...A slowed-down, tumbling bullet is exactly what would be expected..."
Except the entry wound in Connally's back does not support the notion of a tumbling bullet and so it doesn't matter what Lattimer's experiments showed. Lattimer was also vague as to how he set up and achieved his results, and he does not address the fact that all the Mannlicher-Carcano bullets involved in the Edgewood Arsenal tests were deformed at the head of the bullet after striking bone.