I found some 2.5" mounting brackets on Amazon.
The roof racks on Xterras are 2.2" so I created these to add to the brackets to adapt them to my rack.
I ran these on a Bambu P1S with ABS for UV resistance. I used basic support and thickened the walls up a bit.
This is my first upload so let me know if I can do something better. : )
The author marked this model as their own original creation.