Edit3: to cross stuff out now that i am no longer confused. Please see post #2 if you wish to avoid confusion. The front face of the disconector wings. Let me find a pic. I have not had the opportunity to do this modification myself so i can not tell you what to look out for or what side effects may arise.
I am also unclear what you are trying to accomplish. What dose moving the SA and DA break closer together achieve? I may just be missing something.
Edit: The lower area that is pointed out in this image.
Note: This picture was originally produced for trouble shooting a failure to reset. The area that is fitted to regain a DA reset
is the same area that would be modified to change the DA break point.Edit2: I am not 100% on the underlined statement, i am thinking that altering the face of the disco wings may just reduce the DA reach and reduce the overall DA stroke. Maybe another forum member more clear on the subject will chime in.
Here is a reference picture for how the disconector and the trigger bar interface during the Double Action pull.