On 50-60 hives this year I have checker boarded in 3 frames of foundation into my singles, pulling the brood above the excluder to coax them into the second box.When I put back foundation I put in slots 1,3,5. There were brood frames with varying aged brood on both sides of 3&5. Hopefully this will not turn out wrong. She is a fast and productive queen. Out of all the frames in the brood box, only 1 was a honey frame. I was only going to take 2 frames for the split but since there was so much I took 3. Thanks for the input, if in a week they aren't pulling comb I may just shift all the foundation to the outside as I've always done.