I have resisted ultra sonic and stainless pin brass cleaning because I have a relatively new Dillon vibratory tumbler, and I don't want my brass wet and don't want to have to figure out how to dry it. I do like the super clean cases! Is there a way I can keep using my tumbler and get better results than using walnut or corn cob media? I've heard of using rice but never tried cause it seems too soft. Could some type of ceramic balls, plastic, or metal media be used? Who here has tried anything new?