NB did not fall against the Aga. He was chased to the kitchen by SC and fell/stumbled into/onto the chair. He lifted his right arm in an attempt to defend himself from the blows. His found position was consistent with hypostatis as confirmed by Dr Vanezis and Prof Knight for the defence. All of this is futher supported by the gunshot wounds to the back of his head.
I am not sure whether you actually believe this so-called Aga evidence or you are just taking the P!
Oh deary me, Cutie! You're yet another one who doesn't bother to read my scenarios properly!
My scenario is very similar to yours, 90% the same but just with added Aga burn evidence [ok,ok. theory]
We both have things kicking off in the kitchen, but at different times! You at 3.10 me around midnight!
You have Sheila run upstairs and shoot June before turning the gun on Nevill who has followed her upstairs after phoning JB, Nevil is then chased to the kitchen and finished off, ending up on the chair/scuttle [we both agree on this, if you care to check out my scenarios!} Presumably. you then have Sheila re-load before going back upstairs to finish off June and then kill the boys!
So yes, my scenario starts with Nevill and Sheila in the kitchen too, but around midnight! An argument of somekind ensues or Nevill simply finds Sheila with the rifle, Sheila bashes Nevill on the head/face with the rifle butt and he lands out cold with his back against the Aga.
Sheila goes upstairs and shoots June and then the boys.
Nevill regains consciousness around 3.00 and gives JB a brief call before staggering up stairs. Sheila has been writing farewell letters to her birth mother before praying and reading the bible in the main bedroom, she hears Nevill shouting out as he climbs the stairs and picks up the rifle.
Nevill is shot and returns to the kitchen to be finished off on the chair/scuttle!
So, as you can see, we 'BOTH' have Nevill ending up on the chair/scuttle where the police found him, Cutie! Right???