I believe Brenda pours her layers without using dividers. I have done two layers without dividers and it isn’t so hard. Just prepare 3 separate 1lb batches of soap, keeping the oils and lye separated until you are ready to make the batch. First pour your first layer, pouring at a medium/thin trace. Then start blending your second batch, bring to a thinner trace than the first layer and slowly pour onto the first layer. Then blend your third layer, bring to a thin trace, same as the second and slowly pour over the second layer. Cover and let sit for a couple days before slicing. The layers should be firmed up enough to pour on top of each other, while you are taking the time to slowly blend the next layer.