Nubian,
I think it is the current OEB Report but probably before the B3e retro. dtd Revision 4 : 06 08 2012 probably now covered by OSD info held by the manufacturer.
It was my comment to add that B and BA don't have a compensator.
The "single family" goes in order of release B,D,B1,B2,BA,BB,B3,B4,B2 VEMD,B3+,B3e and finally T2.
Dual HYD models is another kettle of fish with their own little traps!