Ordered this set last year and fitted without a problem. I just got a new order and my HEPA filter didn't fit. After a few minutes I saw that the tip was not included. I took a pair of wire cutters from my tool bag and cut right into the cut area, removing about a millimeter (as shown in my drawing). Crashed right after. The second filter is in place. Almost sent back but the problem was solved. I'm guessing a slight manufacturer error.