I've got a Sebo, rotowash rotory & a Oreck orbitor.
on domestics I use the 12inch Oreck, but on commercials I use the 17inch rotory mainly because I like to post-bonnet the carpet when I'm doing large open areas.
I did an old cinema which is now a large meeting room when I went up to the balcony and looked down it was like a patchwork quilt with some areas cleaner than others, so I post-bonnet to even it out,
just out of interest here's the bonnets afterwards, just shows you never remove all the dirt
