I know what you mean about your knees. Crawling around on my floor is bad enough, but getting up is near impossible. I have started to use my Flynn quilt frame to pin my quilts. I roll them up on it and pin a section, then roll a little further and pin again. It keeps my quilt and batting tight and is a breeze to do. I can do a big quilt on my dinning room table. I don't like the frame for quilting large quilts, Too hard to move so I'm glad I found another use for it.