I have used spray basting for wall hangings up to queen size and haven't had any problems. I haven't had any problems with it sticking until I am finished either. It works great. I still start in the center and work my way out. It probably isn't necessary, but I like to avoid those unexpected surprises when possible. If you have a design that could use the stitch in the ditch as suggested earlier, that would also give you more security as you FMQ. I think that spray is the best thing since sliced bread! Good luck.