Rex Boys asked:
>  "Hold on a moment", I hear you say, " How does she manage to get a =
> fertilised egg into the much wider queen cell?"

By coincidence, last evening I watched an Australian video which stated that
the worker bees transferred an egg into the queen cell. I had not come
across this suggestion before and have no idea if it is correct, but it
would be an alternative which would fit in with the rest of your theory.

John Burgess, Editor Gwenynwyr Cymru, The Welsh Beekeeper