I have a fusion 10 kiln. I fused a 11 inch circle mosaic piece. One side was more like a almost fuse and the other side came out a full fuse. To make the piece even with glass, my husband turned the kiln shelf 180 degrees and I full fused the piece again. It came out perfectly even, but now I want to slump the piece into a bowl. What do I do about the uneven heat? Lou Ann