Personally speaking, I think everyone is making too much of the glazing problem. There cannot be more glue in there than there us holding the cabs in the class 22's, and with care and perseverance they can be removed successfully, even by a hamfisted sod like me.
Also a message to Jono20, after what you've done to the Deltics, anything on the Western will be a doddle, trust me.
Mike.