This makes so much more sense than the cricket bat making sounds like gunshots.
I hope you can send your research to Nel and Grant even though there probably will not be a retrial.
Actually, in principle a cricket bat striking a wooden door could sound something like a distant gunshot IF the listener is not alert or astute. See
http://www.mirror.co.uk/news/world-news/oscar-pistorius-trial-watch-alexander-3228570
At one time I thought that was the favoured candidate for the earlier bangs, certainly not for the later.
It was only the Stipps who heard the earlier bangs, they were quite close to the source of the noise, Mrs Stipp was flu-ish, Dr Stipp might have been woken from a deep sleep. To be honest, it isn't so much the sound itself as the tempo of the bat strikes that rules it out, but then the Stipps weren't accurate on the number and tempo of the second "bangs". Some people don't retain the precise detail of what they hear. As long as they retain enough detail, it is good evidence, especially if it is corroborated.
Now I'm unsure about the cricket bat strikes accounting for part of the first sounds, for example because of Mr Fossil's alternative, but don't rule it out either. Oscar has form, ALLEGEDLY, smashing doors in a rage. He settled a court case just before the trial, in which he ALLEGEDLY injured someone smashing down a door.
http://www.dailymail.co.uk/news/art...accused-assault-slammed-broke-door-party.html
The state were silent on the earlier bangs, I guess because they didn't think they needed it to present their case. Unless they had EVIDENCE that there were further gunshots, it would be speculation. Likewise, I guess, the cricket bat strikes are speculation. IMO they were wrong to make it common cause that the damage to the door occurred after the shots.
There was no corroborating evidence on the first bangs which the Stipps heard, except loosely there are signs of an argument before 03:15 that wasn't only verbal - unless Oscar is very messy, is accident prone in breaking tiles and panels, etc.
What Roux did (in effect repeatedly), which was very devious, was claim that the defence didn't need expert witness testimony that the bat strikes could resemble gunshots, because the Stipps heard the bat strikes and believed that they were gunshots. Of course he then went on to allude to common cause that the gunshots preceded the bat strikes, and the rest, as they say, is history.