I think i was to try it again i would do it during hibernation.. perhaps there would be a better success rate then. But still good luck mate.
i got the second queen now and put them together one already has a worker but the worker was fine with the other queen and was cleaning her
Fingers crossed than. ;) Hope it works out.
well the 2 queens appear to be playing tug of war with each other atm
edit: i had to remove the new queen as the other one was very aggressive towards it