Iceblossom, I thought you just pinned the three layers all over the place that you aren't sewing. Since it was suggested I quilt corner to corner, then I would leave enough space down that line from corner to corner to allow the machine needle space to work without hitting the pins. I've thousands of pins accumulated since I was in the military starting in the late 60's. Funny how almost every garment has a safety pin or some kind of pin, and I just kept throwing them into a box.