The amount of "overhang" depends on the length of the load attached. On my scale model of the WECX 801 I have built a typical load which is a scale 80 feet long. The actual overhang of the WECX 801 with this length load connected is quite large since the whole assembly pivots.
Note: The stability of the scale model is quite good since it has the load distributed over 36 axles with multiple pivot points.