how are those firesteel notches, in terms of effectiveness? A buddy of mine had one put into his knife. His looked more similarly to a dull, vertical guthook. It threw sparks well enough, but not better than a false edge on a smaller knife.
The thing is, I could have ground the spine down a bit to square it off and create an edge for firesteel striking. But my BK2 came to me with a pretty round spine, so I opted for the notch. I feel like it works better, but I could be mistaken. Common sense tells that if there's more surface contact, there's more friction and therefore more sparks. I didn't want to grind the spine down, it would have taken a lot longer that just filing and sanding the notch and it would have looked weird. I'd have had to remove a lot of material, and I don't want to compromise the tankiness of the BK-2. On smaller knives squaring the spine off is a no-brainer. I have done it on my BK14, which is s great spark thrower, and on some of my Moras.
I'm thinking about stippling the scales or making my own... just a thought right now, I really like the stock scales, but I WANT TO MOD STUFF
Thanks to everyone for their responses. I'll try to contact bushman5 about his lifter notch.