When do you pros suggest I open again for re-inspection & queen cage removal?
Not a pro here; but my answer:
If they are eating the candy, she should be out son and they will not kill her.
I think you should wait 6-8 days from your last inspection. Why six days? It will take a few days for the queen to start laying eggs. It can be hard to find a queen in the mass of bees, especially if she is not marked. In six days she will be released and be laying eggs and some ofthe larve may have hatched into larve. By 8 days, the larve will definitly be large enough to see.