I make several charity quilts each month, none of them larger than twin size. I have a large flannel backed plastic tablecloth pinned to the wall. I pin the backing to that, spray with basting spray LIGHTLY, then smooth the batting on. Spray the batting LIGHTLY and smooth the quilt top over that. I used to put them together using a large table but tried the wall after reading about it somewhere on this board. Whoever posted that idea, thank you, thank you, thank you.