I modified the existing design to fit on the goggles in Thingiverse part 672714.

These aren't quite finished but my computer crashed and lost the CAD files so I probably won't update them any more. But feel free to use just the Iris or use them with the goggles if it suits your needs.

Also you only need 11 of the leaves and pins but I was printing 12 incase one got damaged or something.

1. Print all of the parts.
2. Glue one pin into each leaf so the nub on the leaf and the pin point in opposite directions.
3. Put the leaves into the front_mnt carefully
4. Add the pivot wheel (be careful of the orientation of the wheel when installing)
5. place the Back_mnt over top of the pivot wheel.
6. Secure together with (3) #6 bolts and nuts

Enjoy.