im looking for a cheap precooler and i saw this one Weed Star Bubble Precooler CS3 - 18.8 - English - Grasscity.com my question is does anyone know if the bowl is on a slide or is 1 piece. cuz i wanted to put my double filter bowl(18.8) on top of it or if i have to get a different one and if so can sumone showe a cheap precooler that will do what i want.