Mike on the IA board who knows more about this stuff, showed that a shot on the stairs wasn't possible. I find this stuff pointless, just like scenarios, you can have a million of them and still not know for sure what actually happened.
It's not pointless at all & has come up with many interesting conclusions. How Bamber or Sheila committed the massacre is a huge discussion point.
So far it has been easy to provide a scenario to match Bamber as the killer. Myself, the police & CAL have done this. There are small variations between us, but they all match the crime scene, are very straight forward & easy to compile. The conclusion is this is how Bamber committed the massacre.
With Sheila, several supporters & former supporters refuse/d to say how Sheila committed the massacre. The few submitted scenario's which match the crime scene have all been very different & have had huge holes in them. David has been spending 4 months trying to work out his 5th scenario & is now including diagrams to give it more gravitas. The conclusion is Sheila didn't commit the massacre.
Another interesting conclusion is all supporters who have supplied a detailed scenario of how Sheila committed the massacre, say Nevill did not phone EP. The remaining supporters who are still refusing to submit a scenario still say Nevill called EP.