Has anyone added Cocoa Butter to their MP soap? Was wondering if that would "harden" the soap more, or add more moisture. Looking to add more moisture and suds, not necessarily hardness. The bars are quite hard as it is. I have added shea and castor to the MP, and it turns out pretty good. Has anyone added say, rice bran, or almond oil, or any other type of oils? How did the MP hold up, or did it become too soft?