I combined two weak hives today with a sheet of newspaper between them. I did put a couple of slits in the paper to give the girls a head start. Now should I remove the barrier anytime soon or let the bees do it? It's my first time pinching a queen, but the combined hive will hopefully produce some excess honey.
If you provided both halves with an entrance/ventilation, then just leave it. They will take care of it.
Grid.