Petsfang 4020 Radial fan adapter

Now that there is a petsfang solution available for the CR-10S pro here: https://www.thingiverse.com/thing:3426936
i wanted to adapt the petsfang duct to accept the factory 4020 radial fan because i didnt want to get into attaching fans with different Volt support.
I am including the part that replaces the top of the original duct since the Original petsfang does not allow modifications to it original design.
you will need to chop the top of the original duct in your cad software and merge th