Does anyone have or use a tumbler that is larger than a Thumblers Model B? If so, would you talk about it a little. I'm just wanting more volume than my old Model B. MSC has a few listed, and a Google search shows a few others. A fellow on another forum makes one that looks good, might be called a "Big Dog" or something like that. Kinda thinking about doing 500 or a 1000 223's, volume wise. I want something commercial quality, like buy once, cry once! Thanks in advance, Lightman