AH well the experiment is over. I caught them streaing back to the real hive the other day. Flew off in a stream the 20 yards or so to the other hive. The larvae are gone, I couldnt find them dead so I spose they developed.
The chewed cappings in the bottom of the super were from the frame of honey I put in there. Seems they ate it all and them went back home. The what turned out to be drone comb that I placed in there, is all empty.
So the end result is I have 2.5 drawn frames to store away for next spring.
The proper hive is thriving, bees flying in today like fully laden bombers, so much white pollen on them its amazing. The tree they are getting it from is a white Calistamon that grows next door. So no harm was done. It was interestng to see it all happening. (you can stop grinning now guys).
Next summer, geeze this one is only half way through, I will make a proper split.