Best wishes Cockney Steve but the Dyson vacuum was a failure until he re-designed it over and over , I think they are still tweaking it
Cyclonic separation is an excellent way to separate dirt from air in manufacturing and industry but it requires a constant volume of fast moving air ..... and it initially worked fine for Dyson on his test bench.
But as soon as the housewife used it on her carpet or furniture the flow of air was restricted and most of the dust was sent back to the room.
It had to be modified so much to keep air flowing that it ended up with very little suction (vacuum) .... but hey , the housewife did not have to buy replacement bags , just spend all day dusting all her furniture , shelves , counters and ornaments ... stuff they didn't tell you in the sales brochure.
I credit him for high prices , pretty machines , convincing marketing , stubbornness and tenacity , but not for a good vacuum cleaner
The best vacuum cleaners are central vacs for the simple reason the dust laden exit air is all vented outside . They have some primary coarse filters in them that need occasional cleaning , but they are mainly there to protect the impeller turbine from particle erosion