I have 2 new Russian queens ordered (arriving today) with the goal of seeing how my dbl nuc hive box set up goes through the winter. But I also know I have 2 under performing colonies. Would it be best to requeen under performers now instead of in the spring, maybe use the under performer queens to guinea pig my nuc wintering setup? I guess so. What steps would I take? Do the colonies to be requeened have to go without any queen for a while? If so, how long and what is the best way to store the new queens in the meantime?