I found both washing soda and borax today so I want to go for it. I have several ideas for the grated soap part, but I wanted to get other's opinions on the best soap to use. 100% OO? CO? Lard? A mix? I have several batches of various recipes I can use, or I can HP a batch - I want whatever will wash clothes the best. I've got about a week of my ALL Free & Clear left then I want to try this out so I better get on it.