I want to add though ... the sample above was not with fusible, I used a simple glue stick to place the pieces. Since then I began working on another project using raw edge (again, all batiks) but this time using fusible. This new piece has places were there could be as many as four layers of fabric (and three layers of fusible) in a given area. When I tried to outline my pieces with a monofilament I ran into a new problem .. the fusible left holes in the fabric that will not close. Because the thread was invisible, the end result looked like a series of holes. After experimenting on a test piece with different needle sizes (even the smallest needle left holes) and different thread, the best result I had was to use a self colored thread as it masked the holes more than the monofilament would have.
The lesson I learned is that I won't use fusible anymore. The glue stick did the job as long as you didn't handle the piece too much before you stitched the edges down.