Mechanical Iris V2

I should be studying for my calculus exam tomorrow, but instead I designed another mechanical iris. This one has four leaves and was designed from scratch. No help from the internet this time. On my first attempt to design this, I tried to make it have 6 leaves, which I soon discovered is really tricky. It would require more than three layers of parts and a significant chunk of time to design, so I ended up with four leaves.

If this works on the first try, I'll eat my shoe.