Not to dimish the achievement, but TFA is pretty clear about the limitations of the piece: > I was able to get it working consistently, although it did lose 2-

Not to dimish the achievement, but TFA is pretty clear about the limitations of the piece: > I was able to get it working consistently, although it did lose 2-3 balls an hour and could only run for a few hours without the motor overheating. IMO that's more impressive to hear than if he hadn't mentioned it at all. (I would have assumed more marbles getting lost.)