yeah, not sure about that number either. From memory he spent about 3 years working everyday in his shed perfecting the design. Prototypes were made from cardbo

yeah, not sure about that number either. From memory he spent about 3 years working everyday in his shed perfecting the design. Prototypes were made from cardboard or metal and he kept details records This is the guy who invented the Sea Truck (which I have vague memories that it was involved in some battle in the middle east), the ballbarrow (a simplitic/obvious invention that no one had come up with previously) and a few other things. The idea for the vacuum came from the fume extractor which in turn was inspired by a large commercial extraction unit between his (James') home and work. to adress some of your points (I own a 5 year old Dyson): - don't lose suction only applies until the canister is full, then well... it's full and needs emptying. Based on my experience, this claim holds true. - they fineprint after "only cyclonic vacuum" probably says "with no filter" or something. Our's has a hepa filter, but that only needs a wash every few years. Most other cyclonic vacuums I've seen have a filter that requires cleaning. - build quality on ours is great. Thing is tough as nails and looks like it'll still be going strong in 10 years time