I've snapped a couple to over the years, the sacrifice that's made for hardness unfortunately. Yeah, I think this crack is historic and just missed by me due to file being dark and rusty to start with. Old leaf springs are suppose to be a good source I believe.

Thanks for your nice words, I was expecting a wonky blade edge and all sorts of issues with a first try LOL.

I'll be hitting the woods soon and testing it out for batoning, feather-sticks and might even flint n steel it down the spine for the fire. (I'll sand the spine after to remove the strike wear).