Pump design

Here's one of several pump designs I have.



I laid this one out linearly, but the same mechanism can be wound around a core and incorporated into a tower.

The initial stage needs a space of 5hx3x3, and will start raising balls from the third vertical level. Each additional stage adds another 5x3x2 section.

This design is less likely to fail due to variances built into the physics engine over time.