maybe no help, but I stopped changing mine on the floor/mat/changing station, etc and found that with a bit of practice I could change them quicker lay on their back across my lap, using the hand furthest away to hold their legs up and the free one to do the wiping, putting nappy underneath and then doing up, meant I ended up being a lot quicker and there was a restriction on their movements as they weren;t able to wiggle as much and couldn't roll, simply because there wasn't any space to!