I just finished doing my Corona Mill, it's far enough along to mill about 5lb at a time right now. Here is my Youtube video on it. It's around 14 minutes long, and all the parts cost me under $40.
http://www.youtube.com/watch?v=kcZZ1DW2siU&feature=youtu.be
http://www.youtube.com/watch?v=kcZZ1DW2siU&feature=youtu.be