Took a peek today to make sure they had found the new frames I put in last month. Sometimes the queen excluder can throw them and they don't find it, but didn't appear to be a problem. They'd drawn the comb and started to fill the cells nicely. I caught a glimpse of the queen (green dot on her back in the right-most picture) when I was down in the brood chamber (I wanted to make sure she was below the excluder).