Mechanisms Reload Tower mech

As usual, I'm not sure where to post this... but here's the mechanism I came up with for my level "Reload Tower". If anyone has any ideas on how to tweak it, please feel free.


The sled on the ground is a duplicate of the one in the mech, just to show how it's put together (rounded edges as much as possible so the ball doesn't get stuck going through). The sled itself is on a 'bed' of Stone Pillars, so there are no sharp edges to catch it, and of course there are a pair of openings in that 'bed' for the balls to go through.