I have had good luck using safety pins, the kind made for quilting. Have not had problems with the backing and I quilt them on my Pfaff 2134. I have used flannel, minky, and cotton for backing without puckers. I do have a large crafting type table that I bought at Hancock's and use painters tape and clamps to hold all layers together tightly while pinning. Also, start with SID around blocks to stabilize before I do other quilting, think a Leah Day idea. I have found her ideas to be the most helpful for me. Good luck on finding a way that works for you!
