The following two pictures show the harbor buoy with the buoyancy spheres. The first is with the Test Point Volume Radius set to 25, and the second is with it set to 50. The point being that one has a visual representation of the Buoyancy Movement Component’s parameters, and one does not have to actually set values in the Test Points Array, the BP macro handles the population of array.
Radius = 25
Radius = 50