Overlapping markers / labels in google maps API v3

I have a google map with several markers / labels very close together. So close that if the zoom level is at a certain level, all the labels overlap.

In order to be able to read all the labels when the map is loaded and when the zoom level changes, I want to place a marker at a specific offset to the actual point using a line drawn on it.

I tried to implement George McKerron's "OverlappingMarkerSpiderfier", but according to the author himself, it cannot be done using his code (due to the fact that his code is attached to an onClick listener and can during map load or zoom level change)

Hope the above description is clear, please explain that English is not my first language.