Just some thoughts on steels and mill rollers-it looks like the BC and JSP use 1018 steel, which is a low carbon steel. That makes it great for machining, but not so great for wear. I believe I saw something about case hardening for the JSP, which is most likely a carburization process. This would make a huge difference in wear life. Looking around, monster mills use 1144 steel, which can be quite a bit harder. I haven't used it (Still using my sweet Corona mill), but if you're spending ~$200 on a mill, you might as well go with a higher grade steel roller.