The old rivet holes near the rear of the receiver. After the conversion is complete, you are left with two holes on each side of the receiver. Some use alum screw posts, some use screws, some weld up and grind down so there are no holes, and some just leave the holes as is. I was wondering about drilling the holes out to accept another set of trigger pins and then using "E" clips to hold the new set of trigger pins in place.
Advantages:
steel pins
you have something to attach the wire 'shepards hook' to hold the trigger/hammer pins in
usage of standard AK parts
Disadvantages: