Rosen, Do try the Santha or Premier Grinder for chocolate making. The results are really good. The first bar I ever made was a mixture of cocoa, cocoa butter, milk powder and sugar. The results were a bit grainy and didn't really taste the way I wanted. My first experiments using cocoa beans and nibs convinced me that I was on the right track. The only problem is that you will become very judgemental over shop bought chocolate. You can order beans and cocoa butter from HB Ingredients on their Bean-to-Bar website.
Oh, I thought I recognised your name so I looked it up. I may well take a look at your chocolate book!