I've finally got all of my supplies and ingredients. I am now playing with soapcalc. I saw that the lye default is somewhere around 27% but I saw on the forum that many of you soap at 33% or greater. What is best for a beginner? What is the difference between the 27% and the 33% solution? Harder/softer soap? I changed my recipe to 33% and then I had doubts of what I did. I thought I'd better check first.