#1 Is it self-propelled?
Firstly, I love this machine. Bailed me out of many feet of both wet and light snow. Yes it propels itself as the rubber blade rotates and, in making contact with the concrete, pulls the machine forward. Good for blacktop and concrete, NOT for gravel as the height is not adjustable. It's meant to be propelled by the blade contacting the ground and gravel would chew the mechanism up and spit the rocks out.