Bachmann Mk2F DBSO 39-725 - how do you get in?

[ColinK]

I am busy detailing my coaches at the moment, but stuck on just one.  The Bachmann Mk2 Driving Brake Second Open (DCC on-board), I can't find a way of getting the body off so I can paint the interior and add passengers.

 

All my other Bachmann coaches are easy to get into by running a fingernail between chassis and body, but it doesn't seem to work on the DBSO. Does anyone know the way to get in?

 

Thanks