Here's my thinking, pretty much as I typed it (so no comments please about grammar or semantics if you know what I was intending!) on How did Oscar's version come about? This is based on the premise that the bat then gun scenario is what actually happened.
It's very much a work in progress but I'm happy with the gist of it. I thought it through literally as I typed it then made a couple of changes. You can even see my thought process at the end when I explore why he didn't check the bedroom door (I know this isn't in the bail statement but his (lack of) thinking when checking the bedroom affects the additional steps he has in his version).
Comment etc. all welcome.
I think you still have the problem of the helps not being in the right place with Johnson/Burger though - I know you addressed this before but I didn't really see how you could argue this successfully. Both of them, at least while giving evidence, were clear about when they heard the helps and what they thought at the time when hearing them. Given that putting them there actually makes no sense on the state's version, and Burger at least was sure the state was right, I'd be less inclined to think that they got this wrong.
And depending on how you take Stipp's evidence, the helps could have been after the successful call which would place them at around 3.16 as well, also before the bangs at 3.17 (by his 10111 call). All very unclear however.
In general, I think you given OP too much credit in coming up with a version that then just happens to come out right - because neighbours got their phone times and the placing of the helps wrong (if they did). It's just so lucky if it's all made up.