I'm a beginning reloader. I just bought a used RCBS 505 scale on Ebay. Before I start calling it names, maybe I need some help ( no instructions came with it). The only way that I can get the scale to hit level before I put any thing in it, is put everything on 0 except the little piece of metal alway to the right, it has to be on 1. Is this right or wrong, I'm thinking everything should be on 0.