I managed my first flint and steel ire recently and a serious lack of ease when using my A2 north star for the job versus a proper flint strikerwhich threw far more sparks. I noticed the mora threw slightly better sparks and made it much easier to use for flint. THing is I don't really like the mora all that much, but I got to thinking what peoples experiences were with the spine of their other knives throwing either ferro rods or flint sparks. Normally I would use the back of my leatherman saw for a ferro rod or a carpenters scraper which throws great ferro sparks. I didn't really try other flint striker options I had at the time but want to when I can find some decent flint to try with. So, yeah, in a nutshell, for a chopping suitable or generally heavy work tempered knife what is your best flint spark thrower? And I say chopper because if I can't heavily baton with it I am not interested. I do expect my blades to nearly take on axe work...(mainly cause I don't ever want to risk breaking one.