I had limited success with FMQ until I started using Hobbs 80/20 fusible batt. I always got puckers in the back no matter how carefully I pinned and sewed. I think that the spray basting would work well too but due allergies that is not an option for me. Fusible batt does take some special care but I won't use anything else now. I have old carpet in the basement and I lay my backing down first. I then spread out the batt and then my top. I iron the top side first smoothing the fabric before me as I go. I then flip the sandwich over and iron the back. I put a few pins around the edge and then go to my machine and start quilting from the middle out. After the middle is quilted, I sometimes re-iron if needed. It does take some extra time but no more than putting in all the pins. Try it on your next quilt, you may like it.