My advice is to try convexing a few cheaper knives before jumping to convex my first infi. I did one folder first. It really is not super hard. Bark River knife and Tool has a tutorial, and there have been many good ones on here. I just used sand paper, sheet of glass, sheet of mouse pad, and a leather strop. Just go slow. I still am not ready to convex my FBMLE yet. I will have to let that one wait a while I think.