Hay! Who says there isn't a guardian angel? Congratulations on fixing it!
I do use a 1/16 pin for the trigger guard and the thimbols but I like the 5/64 dia pin for the barrel underlugs. I think the little extra strength the extra 1/64 gives the drill a better chanch of drilling thru without breaking.
In fact, after reading about your problems, I may just use the 5/64 diameter pins for the other parts too.
I do use a 1/16 pin for the trigger guard and the thimbols but I like the 5/64 dia pin for the barrel underlugs. I think the little extra strength the extra 1/64 gives the drill a better chanch of drilling thru without breaking.
In fact, after reading about your problems, I may just use the 5/64 diameter pins for the other parts too.