With such a mess of a patched inlet, putting the lock in by conventional methods just won't work.
Here is the way one typically inlets the lock internals, one piece at a time.
In this case I have a real mess to start with, my patch and the old factory inletting which is in the wrong place.
I am going to have to inlet the whole assembled lock at one time. I started with a drilled sear hole (in the wrong place at first) and the start of the mainspring inlet and went down from there. Black with soot and check, remove nay black marks where things are rubbing.
I actually got it done in a couple of hours, I will clean up the rough looking stuff today.
The lock functions properly, I sure am glad the lock plate covers up this sloppy inlet.