I dont know where to get the Multiball model. I downloaded the course files but inside was only a blender project. Im on 5.1.1 blender by the way.
Hey,
The Multi-Ball should be in the course files somewhere.
If not, you can find it the free downloads section [Multi-Ball 4.0]
We do advice using the Blender version that the course is taught with if your new to Blender.
You can download any Blender version.