I use safety pins to mount the quilt backing up onto a large flat old king-sized sheet that has been thumbtacked onto a large blank wall, then spray-baste, then layer the batting, spray-baste the batting and then layer the top, making sure that each layer is smooth. The process if very fast, the sheet catches the overspray, the quilt is perfectly smooth and quilting is a breeze with no shifting or wrinkling. A step stool is handy for reaching the top if you are short like me. The basting spray does not jam up my machine or needle and has never caused me any problems since it is a temporary adhesive and washes out. I will never go back to doing it the hard way!