A tip for sandwiching vertically
Yesterday I was talking with a woman who shared with me her method for basting the layers of her quilt together. She said it's too hard to get down on her knees anymore (I can relate), so she used her metal garage door. She used magnets to attach the layers to the door, then spray basted. She said it worked perfectly.
Thought I'd share in case others find it helpful. Happy quilting!