I spray baste standing up. I use 4'x8' sheets of rigid insulation for a design board. It is not covered with anything (I just keeping using straight pins) so I pin the backing on, smooth and then spray, then I put more pin all the way around the quilt, about a foot apart, then I pin the batting on and smooth down (I sometimes spray a few spurts of spray baste on the batting before I smooth it down. Last I pin the top just across the top. Spray the batting and the top, smooth down, then I use safety pins about every foot all around the quilt. This keeps me from having to crawl on the floor, which I can't do anymore, and also saves my back. You may want to give it a try. Also if I have more than one quilt I wait for a still day and then move my design wall outside and spray there. I have basted up to 8 quilts in one day using this method.