Inline 6 Engine Fidget Toy

I made this inline 6 engine a couple of years ago, and I still fidget with it. It's very mesmerizing to watch the rotating assembly spin, especially when you add the flywheel onto it. Without it, it doesn't really carry enough momentum to keep itself rotating. Mine is not pictured with the flywheel since I dropped it, and it snapped off right with the crank. The flywheel also has a drill attachment for those who want to see it at high speeds (it's awesome). Something I was always cur