This is a lift built by Sorunome
. It consists of a chute, and the balls are pumped up by a mechanism at the bottom. A gate keeps the balls from falling back down. There is a piston that moves from side to side, which pushes the balls upward. This lift can be a problem if you don't have a lot of balls, because you can only make it as high as how many balls you have. Here are the instructions!