I couldn't get uin there to edit that post, so I'll add that these knives are all HARD!! maple, mallee root, desert ironwood and african blackwood.
Take your time, keep your file clean and the radio on.
The fit and comfort of the handle is one of the most important aspects of the knife. You have almost limitless control of the shaping process when using files.
Do a little searching and you can find the files that suit your needs.
I use a cabinet maker's rasp for the initial material removal and it takes stuff off almost TOO fast!