However I learned from this casting, every time I fire a new design, there is always something I can do differently. The depth of the piece isn't what I expected, but it was all the glass the plaster investment mold would hold. (The most embarrassing/frustrating thing to have happen in kiln casting is for your mold to have the dreaded "diarrhea of glass" in the kiln. Aka- mold breaks)
Next time; if there is a next time, I'd put the glass in flower pots above the piece. I'll be doing some serious coldworking to finish this one!