Sorry scipio you are mistaken . Do a search on his threads and you will see he has been given "scenarios" ( because that's all they are , even yours) , he just ignores them .
Well only David (twice) and Alias have typed a post on how Sheila committed the massacre.
Lookout and Grahame have both said what Sheila may have been doing when Neville phoned Jeremy.
No one, apart from David & Alias have so far said who Sheila's first 10/11 shots were at.