Thanks Kelly. You know, just thinking about it maybe I do have something. I have an old Rockwell block vibrating sander that always has a hard time getting up to speed when you first start it. It's a harmonic problem. I usually have to hold it against something solid to get it out of lower resonance into its high rate. And it takes a while. When it's at the low rate, it's really hard to hold, your hand really tingles after that vibration -- nearly at a painful level. Maybe that will do the same thing to a flask. For a flask I have a lot of choices, but maybe just a standard steel bucket would fit both castings in. For a pouring basin I was thinking a cutoff of thin wall stainless tube I have -- I think I might have both 1.25" and 1.5" on hand --- probably larger up to 2.5" as well. And lots of sizes of steel pipe and tube. The other possibility is molding some fireclay and sand, and firing that to vitrify. Or forming that inside a section of pipe. Suggestions?