ROLL19 R21 turbofan idea

I wish I could design and engineer my own turbofan for my Abarth but I don't have the tools and skills to make the carbonfiber part and to create my own longnut. 

Despite that, I made this design for 2 thing : 

• To know of it can look on theses wheels, what dimensions should be the part.
• To find a good solution to bolt them on the wheel securely.