I too have trouble with knees and my back, and getting on the floor is not something I can do anymore. So I took a bunch of pictures off my wall, hung up a 9 ft. 1x4 and then put up a tarp and now I hang my backing to the 1x4, spray (the tarp catches the over spray) and then I put my batting on the backing, then spray again and then I put my top on the batting. Then I pin with safety pins. It's not pretty but it is soooo much easier and faster too!