No problem with your reply kev.
Your right in respect that doing areas of 200 metres plus you would need several melamine pads, but then they would be costed into the job. The advantage with melamine although slower is they can clean with just water, on an area of over 100 metres a scrubber dryer would be my preferred machine but I would, and have, used one with a cylindrical brush. I use a pro 35 with 2 contra rotating brushes to great effect on safety flooring great for getting into bevelled edges on LVT as well. The thing with safety flooring is I have never come across a large open area, it's usually lots of small area's. Bathrooms, toilets kitchens etc. All awkward spaces.