Well, that didn't work out. If I install the hammer screw with the hammer in the uncocked position, the hammer won't pivot. It seems the firing pin stops the hammer from rotating. If I install the hammer screw with the hammer rotated back, the firing pin won't go through its aperture.

Right now, I've got the "original" hammer reinstalled.

I'll take it apart again on my days off and re-examine the pawl and the trigger .
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