Nice one Pete for the numbers, looked at my extractor specs and it only flows 66cfm so that equates to 0.099 square metres that would only be 300mm square table it’s a little small. Really wanted one roughly 600x1000 in size. So I guess I need a larger capacity extractorThe place I worked in had half a dozen or so downdraft tables. Each one was about 4' x 8' and had a 5hp motor drawing 3,000 CFM. (1.2m x 2.4m at 5,097 cubic meters per hour). A vacuum cleaner, a high pressure extractor, like a Festool generally moves about 100 CFM/170 cubic meters per hour. Can you do your sanding on a 1.6 square foot surface/a little less than 0.15 square meter? If so it will work just fine.