In reply to maschinenbau :
Greetings, borther.
Maybe the best self-propulsion you have ever seen. It's like dancing with a ballerina but you're also a ballerina, so you can keep up.
Will suck the nails out of the floorboards. I don't think the bag has been emptied in a century. We use this one in the shop/"guest house" out back but that's really a waste of its abilities.