I recently did what Vivi did to one of my Natives, that is I rounded off the Native's handle.
It looked very much like Vivi's picture.
Then I went further and totally removed the remaining hump, making the handle straight, just as Vivi has mentioned.
The Native handle now resembles the handle on my Spyderco Goddard folder (micarta, large), and it works great like this.
The original Native handle is very good, and my modification makes it even better for me.
I'm going to do this mod to my other two Natives as well.
I used a file and sandpaper, either will do a good job.
Hurray.