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04.27.2009, 09:53 AM
I dont personally have one, but I have seen one work before. You are right in the fact that they do not used a vacuum. They have a roller shaped brush that spins and "sweeps" the derbis into the collections pan. I'm not sure how well it works on hard floor, but it works great on carpet.
I will spank a nitro any day...guaranteed. :)
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