Zipper Model Shot 1

This is the hardest build I've done, and it's far from being done. It's the classic Chance Zipper. One electric motor rotates the boom, which rotates the 8 yellow gears on the sides, which powers the belt with all 12 cars on it. This model was so troublesome, I have a gallery dedicated to it. It is now able to run continuously without major problem for over an hour

Model is completely based off Greg Nuse's K'Nex Zipper model