Build something

First it starts with a box.

Then you add a block.

To this block you make a small notch.

When do you add the 2-4 rotors?

In all of the cylinders you got

Add the turbo before you forget.

When you don't want apex seals anymore

Then you get out your rings.

Be sure to square up said rings.

You must measure everything.

Now you assemble your things.