Good stuff, must have taken a little while to get all the shots and tests sorted!
I know 440 c stainless can be pretty usable when heat treated well, but why use it on knife like this? Im not a steel snob, however I do wonder why some big name makers churn out knives in this steel when there are plenty of other (and superior) stainless steels to pick from?
We have a a number of Hultafors Outdoor Knives with Firesteels
You can see more details here in this thread OUTDOOR KNIVES
The price is £27 and you can pay via the paypal button below.