Update
Just an update,
I exchanged my firing pin at Numrich with one that now fits in my bolt. It still needs to have the slot ground/cut out of it, and the tip needs to be brought down a hair, but otherwise, a MUCH better fit. Only thing that will definitely be different is that it does not have that little step at the front of the catch on the back of the pin (I attached a picture of what I mean). Martin, do you know if that little step needs to be there for the gun to function correctly?
Thanks,
Billy