What kind of batting do you use? I use Warm and Natural 100% cotton batting and it's wonderful. The top and bottom both "stick" to it really well. I don't use any taping, gluing or anything when sandwiching... just lay out the top face down on a big bed. Then I place the batting on the wrong side of the top. Last comes the backing, right side up. I like to pin from the top, so I have to then flip the whole sandwich over, unpinned(!), and re-smooth it once it's right side up. I just smooth by hand, and don't need to fuss too much. Then I pin with big safety pins from the top, but not too close. Maybe one pin every 10" or so. The cotton batting really holds onto the other layers. I never get shifting or wrinkles when machine quilting. I really think it's the batting!