thank very much for your help both of you. another question, do you know the qt sizes for the tubs like the cb-70 the v-18 and stuff like that? cuz i been looking at racks from Cserpents.com and hes runs the normal 6 qt tub but he also runs the v-18 for his smaller tubs. whats the biggest you would recommend keep in that tub and the other tubs people don't seem to list by qt size?