G.Day Libor,
Just to add to your confusion... And I can only speak on fords,
The cab 11 is different to the cab12 is different to the cab 13.
However, the differences in 11 vs 12 are very small, mounting differently but the same shape.
Happy to photograph both for you (dissembled) if you like but will not be able to post for a while as I an out of broadband!
H
