<< 7. Did with B (my shortcut) the BoundingBoxCenter
???
Presume all objects + "the" point of each object are selected
You must press Tab then write ScaleArray : nothing to do with BoundingBoxCenter ;)
(except for the first point if you want like the little video following,
but this first point can be anywhere! So you can just click this first point without BoundingBoxCenter!