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[Twiggz]

I to am preparing to breed for the first time this year, not intending to incubate under this method....though i would be interested in the discussion.
I can answer one of your queries Miss B:
The reason you need to keep the egg still and facing the same position as when laid is because the embryo attaches itself to the wall of the egg when laid and movement could result in it detaching itself and consequently drowning the embryo.