Hi Robin,
 
1/ I don't see the problem to mark queen after emergence, but to see
   the results of the queens war
 
2/ There is no problem to dissect gently a queen cell along the height
   (2 cuts from the top to the bottom, keep a piece of silk at the bottom
 
   for closing) mark gently on the body and close the cell.  Tight with
   a small piece of parafilm while the bottom is free for emergence.
 
Jean-Marie     <[log in to unmask]>