Sebo fan that's a very interesting idea. You can also test how much of the unit fits and remains still on a stair case and which vacuum has better attachment tackling a carpeted stairwell edge to edge. I like doing stairs with one attachment that gets it done most efficiently and every once in a while going around for full detail with crevice tool. Many of the air turbine nozzles have a thick plastic front bumper and you can't clean back of step by riser well.
The original Hoover upholstery attachment with the red rubber fingers was my favorite. It came with all canisters from Celebrity to Windtunnel and a few early uprights. I wish they were still around. The entire step looked afterwardss, edges and all.
