I want to split my cell builders into 4 frame nucs, in the near future. They are 8 frame mediums (7 + queen cells) over 8 frames of honey, plus four frames of nurse bees. Do I NEED a frame of sealed brood for the splits, or will the abundance of nurse bees with a queen cell be adequate? Hate learning the hard way. I started the cell builders 8-9 days prior to grafting with open and sealed larvae in upper box, restricting queen to lower box. Separated boxes early on grafting day, and shipped queened box to another yard. Tks.