So... during my residency at the Museum of Glass in Tacoma WA, we were able to make 4 small turtles, 2 big turtles, and 6 Jelly fish (3 survived).
I was told when I began my journey with glass that steel and glass do not jive, they have different coefficients... I do not usually take no for an answer so now I know......Steel and Glass do not jive! 
See, this is my problem...... I made several pieces successfully prior to my residency that did not break on me regardless of what my mentor was saying to me, but they kept working and he was shocked each time, so I was convinced that they did not know what they were talking about. It was not until I worked at the Museum of glass that I pushed my luck; we were successful with 5 of the 6 turtles. I was able to fix the one turtle that broke with the help of the amazing Kristin Elliot the Cold working guru at the Museum. I have been humbled by the two mediums and still strive to make them work in harmony. This will be an ongoing struggle/challenge for me, but I am up for it and am lucky to have an amazing mentor to help me through the creative process.