This is my first try to make a parametric model, this means you can change the model's size by changing a parameter. For this you have to open the .f3d-file in Fusion360. Then go to the “Modify”-menu and click “Change Parameters”.
There you can change the parameter for the diameter of the rope.
The diameter has to be at least 3.1mm, otherwise the calculation will fail. Don't touch the "Tolerance"-Parameter.
For those that are not familiar with Fusion360 I uploaded the model in sizes from 3-12mm rope diameter.