I'm not sure if this should go in Shotguns or Gunsmithing, but here goes.
I've got an early (3 digit serial number) TTN Coach gun. The right hammer will occasionally lock in full cock and won't release until I remove the lock. The trigger just flops loosely forward and back, as the arm slips beside the plate that pushes up when you pull the trigger. The arm that gets struck by the trigger to release the hammer sear doesn't quite line up; either the arm is too short or the trigger plate too far to one side. (The left side lock arm covers the trigger plate and extends about 1/16" beyond.)
I don't see how I can inset the lock or move the triggers to one side, since the parts are positions and screwed tightly to the action.
Has anyone else experienced this problem, and what would be a recommended fix? I thought of somehow adding material to the arm to make it longer. I tried supergluing a shim on the trigger plate, and that worked for awhile, but the glue didn't hold long. Maybe use JBWeld or something similar?