You mad fools! You STILL don't get it. No wonder you're LNers, you have no sense of logic or critical thinking.
I can't show you that the MB can't be done. That would be trying to prove a negative and you would accuse me of not trying hard enough. Only you can prove it was possible and you sure as hell can't do it with drawings and graphics. You guys have to get off the pot and conduct a real live physical experiment for once in your lives.
If you are so damned sure that JFK's slouch allowed the MB to "work fine", then bloody well show it with a re-enactment. Slouch in your chair just like JFK did (or find someone who can) and position yourself so that the high laser strikes you 2 inches right of the spine at the T1 vertebrae and the low laser strikes you in the throat at the C7 vertebrae. Then take a couple of photos showing your body position and the 2 laser dots that makes the MB work fine. You don't even have to post the photos. They are your own personal proof that the MB was possible and no one can take that away from you!
As for Mytton, he's just barely competent enough to know the significance of doing this laser re-enactment, which is why he did it long ago hoping to make me eat crow. I'm still waiting.