When the Bro 200 series was introduced in the early 80's they did not have a 3-stage stinger.
This feature was introduced later as an option. Most units have later upgraded to the 3-stage stinger (click here).
With a longer under reach you don't have to use the heavy extension boom. (see right picture)
Buses and other vehicle with long overhang can be reached and lifted by their axle by forks or a special
manual extension. 
Picture shows the standard 2-stage stinger and cross bar.
Click here for original stinger parts.