I recently purchased the Jen-Ken Pro Fusion Fiber 11. I am trying to cast small items (colour de verre holey heart) on a small piece full fuse program; and also larger items (1/4 inch thick x 6 inches wide) on a large piece full fuse program - both with the kiln floor kiln washed and a thin kiln paper sheet fully underneath. The small casting did not fuse smoothly on the bottom (used kiln washed mold) and the large piece simply did not fuse together. Do I need to by a kiln shelf to cast in this kiln? Any suggestions appreciated as I am really bummed to not be able to use this for simple casting.