This lift was originally built in my unfinished ball machine
(skip to 4:47 on the video to see the lift). It uses arms that are parallel, and they are connected in the back. Balls roll down the arm into a claw, and, when the arms get to the top, the ball goes through a flap in the bottom of the next arm. My version didn't work very well, since there was a lot of strain when it was fully loaded with balls. It was also pretty slow. Sorunome
rebuilt it from the video and modified it to make instructions
, shown in picture 6.