FYI: We have a Hoover Air Cordless model number BH50121. I have a love/hate relationship with my vacuum cleaner. First I had to auto-correct the word "vacuum". Second, I hate vacuuming. Third, this vacuum cleaner (if I keep using that word, maybe I'll remember how it's spelled?) attacks those brushes. Hoover has a major design flaw and I doubt this will be my last purchase of this brush for my vacuum. For the record, this is the THIRD roller brush I have had to purchase for this vacuum and I…