Fons and Porter received a tip about piecing bats together. I have used it for awhile now, and it works like a charm. Square up the sides that are going to be pieced together. Get lightweight fusible interfacing, cut into one inch strips - - iron both of the bats together along those cut lines. If you do not think one side of the cut being fused is enough, it doesn't appear to be a problem as the lightweight fusible interfacing is so very light. The type I used is most commonly used for making watercolor quilts - - the foundation with squares printed on it.