This is a link to a corkscrew helix design (click on title) that looks pretty cool. As opposed to having the whole corkscrew rotating, they have just an inside brush rotating that catches and lifts up the ball. 1. The brush works, and 2. This is a simpler way to do a corkscrew. The ball would always make it in, because the screw itself wouldn’t move, so the path into the corkscrew could always be open. Also, maybe more balls could be stored? I know we just came up with our final design, but it’s something else to think about for our tower.