God bless your back if you try to bonnet clean that amount of stairs with a minitex!
However hard I try to retain a good back posture with it, I end up in serious pain after 20 minutes or so working stairs with it.
Also, because of the high RPM it trends to splatter solution. Not great when the surrounds of a staircase are open and it goes everywhere
Sometimes you push too hard as well, i think I've ground off the drive gear in mine so it goes CRUNCH every time I try to give it some welly when bonneting. I knackered it on a pub upholstery job though, with the nylon brush, pushing too hard.
Anyone use an oreck orbiter? Can it be used on stairs? If so would be a much better option for back pain and productivity, i'd have thought.