I finally got my Ghost in the Shell machine back up on the wall, and I noticed that the ball return at the bottom of the cell (I assume it's modded, because it has a white pvc track which leads back to the top ball feed tray where you put the balls you want to play) is catching balls and they aren't rolling down the track. It used to work and I don't know if this had anything to do with having re-mounted it, or having previously removed the cell and put it back in place. But I can't angle the track or otherwise move it, so I don't know how I can repair it? Any thoughts?