I have never sandwiched a quilt on the floor - they would need a tow truck to get me off the floor once I got down there. Some of you may know - the old grey knees aren't what they used to be. I used to use my large DR table, which was nearly 5 feet wide and at least 6 feet long, and I would tape the backing, then batting and then the quilt top down, pin baste, then roll up the quilt until I got it all sandwiched. Not only can't I get down on the floor any longer, but I have a hard time standing and pinning, so this worked for me. I could also enlist the help of my husband occasionally on some of the larger quilts, get him to help pin baste, but I would then go back and add pins where needed. This seemed to have worked well for me. We have moved to an apt. so I couldn't bring that table with me, but I use my DR table in much the same way. They say necessity is the Mother of invention. As much as I would like a long arm, I neither have the funds nor the space to use one. Hope this helps a little with your basting.