I posted a picture
from Geissele's site of the 3 groove pins you can buy. The SKU number is in the picture, you can go to their site and find the pins. They are expensive (typical Geissele), but I think you should consider buying them. I'm not sure if they will help, but the three grooves might give you peace of mind. you only need to use one pin and you can keep the other as a spare.
Picture is in post 29 here>>>> https://www.m4carbine.net/showthread...38#post2895538
I do have one solution, I saw this recently LOL Click for larger image....
Attachment 64145
EDIT: I just found out that Geissele wants $12 to send an $18 set of trigger pins to me. I'm complaining, it'll be interesting to see what they say.