Continuing on this topic, pacifically the trigger shear part number 19636. I believe the tapered angle on the break end is what causes the trigger to not return if you don’t fire and have a very light setting. Something about this taper prevents the trigger from returning because of the load between the seer and the release ball. I believe if this sear had a square cut end The release would be sharper, cleaner and would not have this return problem.
If any of the others out there are gunsmiths I wouldn’t mind having your opinion.