I have been finding answers to the same questions except my reasoning has mainly to do with being too old to pin on the floor. It seemed to me that people who machine quilts pin either on the floor or clamped to a table. No one has diverge from that. Using spray basting was recommended but I have asthma so I can't be around anything that will shoot particles into the air. I too have been reading as much of the posts as I can come across too. I think the best bet would be some type of a quilting frame. You will have to come up with new ways to keep your cat off the quilt when it is in the frame. It is very expensive and there are so many variety. I am still researching. I think I might have to make a notebook to keep track of what I liked or not liked about which frame.