I happened unto this thread pretty late. But, I do want to thank all those whose initiative and hard work went into a "dummy" Seriously, great work. I do have a question. Has anyone ever thought of making a mold of the top and casting it into a solid for use as the base? Dental molding material, or just plain vacu-forming would work very well to make the mold. You then have your choice of material to mix and pour into the mold. Just curious. Again, great, great work.