I know this should be obvious, but I am not sure. I would like to quilt a design to the front of the purse I am making. Do I use a batting on the back or do I use the fusible fleece that is suppose to attach to the lining? If I used both batting and the fleece, would it be too bulky? What about using very stiff non-fusible interfacing, left over from my other sewing life for the back of the quilted part? This is for a gift, so I can't afford to screw it up, and I don't have time to experiment on something else. Thanks for your help.