Yep, we saw the queen and we have plenty of sealed brood, but we still have a few empty frames.Have you got any grubs or sealed brood in the brood box..? You don't actually need to see the queen, and eggs are not easy to spot, but if you have bee larvae or capped bee brood:
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..she is about and laying!
If not, I would not bother with supers until you have about half a box of capped brood.