Does anyone have an exploded diagram for the BSA boxlock - simple double triggers, extractors? I picked up one in tough condition, refinished/recheckered the stock & touched up the metal. This is a bottom of the line gun, but it's still light & swings well, although the firing pins do drag on the fired primers.

The result was a pretty nice gun, but now one of the locks won't cock. So before I start taking it apart, anything special about these I should know?
Regards, Ron