My wife has a dozen or so sheep. This time of year she carries water the 250 feet from house to barn. I thought a cool Christmas gift would be an electric powered tank on wheels. This morning I dug out all my junk...chains, sprockets, DC electric motors, wheels, shafts, etc. This is what I came up with. All it needs is a double pole single throw normally off switch for forward & reverse & it'll be good to go. I did test, the speed is perfect! A slow walk. The handle pivots down for steering, the switch will be on it. Of course now one neighbor is missing his old snowblower & the other no longer has a wheel chair.