Hello Graham and All,
  I cannot find reference to this process and I am writing to you
> today to seek guidance perhaps to other peoples work in this area or your
own opinion.
> but who stays and who goes?
After looking at a large number of hives after they have swarmed it is my
opinion most of the older bees leave with the swarm. The split is not even
and many times the swarmed from hive is left without a proper field force
(almost always).
 I had no comment at all when I last wrote about observing bees moving
> and storing wax,
Bees move wax without a doubt. I use a uncapper which leaves wax cappings on
the comb to help the bees move and cap wax faster. Bees move wax many times
when the temperature is below the temperature at which they can produce wax
(approx. 70 F.).
I have never seen the bees store wax. I have seen wax left from my uncapper
thrown out the front entrance when supers are put on before the honey flow
in early spring. I have seen the bees remove wax from feeders of open
cappings and take back to the hive to seal fall honey with when daytime
temperatures are below 70F.  If bees stored wax then the most obvious place
would be in empty cells. I have never seen a *catch* of wax stored in cells.
Maybe others have but I can't say I ever have and I have looked through a
lot of deadouts.
Sincerely,
Bob Harrison