the one my neighbour had was the geardox off a rear wheel drive car, it had a handle on the side which whould have been turning the drive shaft and just a bracket on the opp side to gather the string, all was monuted on a frame and could change the gears for different speeds, no bother to pull out the string again just pop it into nuteral, only thing is its a two person job 1 to wind and a slipper.