prologos, we (myself included) very often talk about the universe without differentiating--even within our own minds--just what we mean by it. Often when we say universe, we mean the observable universe (technically, the part that's inside our light cone). Other times we're talking about a larger universe which our observable "world" is a part of. There are different ways of describing a larger "Multiverse," from parallel universes, ensemble universe, "branes," superspace, bubble universes, etc. The beginning of our observable universe, at a Big Bang, isn't necessarily the beginning of all existence. This allows for the space-time of our universe to have a beginning while allowing for time in part of a larger universe.
Two models showing our universe within a larger multiverse. Note, also, that these multiverses were not imagined to avoid the need for a god; they arise naturally from QM equations.
on the other subject:----the moon/earth system, the Sun are waltzing, rotating along synchronized, no fairies required, obviously.
This was my point, and it seems you agree. Just as there are no fairies required to explain the orbit of the moon, no god is required to explain any facet of the universe.
... at what radius in time did these pre-big bang conditions disappear?
What pre-big bang conditions are you talking about? There are too many different models to ask a blanket question or give a blanket answer. That said, if I had to take a guess, I'd say many models don't say conditions "disappeared into" anything; they simply transitioned from one phase to another. If we're talking about a theoretical higher-entropy state to the very low entropy state of our early universe, or a fluctuation in a quantum field, there's nothing to disappear.
... but if they did not disappear, that energy can still be a property of the void, and is making it's constant appearance into the space that opens up in the expanding universe. That the gist of what I read. or?
That's not my understanding. If anything, the universe would be said to be expanding into this empty space, not the other way around. More importantly, however we characterize this boundary, the cosmic background microwave radiation shows that conditions of our "local," or observable universe obtain at least to the edge of our light cone, and anything happening beyond that is impenetrable to us.