Sorry if you think I take things "personal" but as a vacuum cleaner collector, I was very much like JMurray and a lot of the younger members on here who adored Hoover and nothing else. I had 100 Hoover vacuums at one point and thought they were brilliant. The day changed when I discovered the SEBO X1 and kissed goodbye to my Turbopower 2 collection...
For your information - SEBO U.S marketed that filter as their own design. Many years ago when I first became a member of another vacuum cleaner affiliated forum, I was surprised to see a paper pleated cone filter for the Windsor series. Upon contacting Sebo in Germany, they only make those filters for certain markets and the UK isn't one of them - after testing the filter, and after pressure from the U.S, SEBO developed the paper pleated filter cone for SEBO U.S markets - but Europe and UK have the felt filter, additional upgrade to Charcoal for pet owners. After testing the paper pleated cone, SEBO in Germany weren't happy to sell it all the markets as it isn't as effective as the felt micro filter.