I picked up a 77OT the other day, more or less just because. And maybe because it's what a cool old guy I sometimes hunt with uses. Anyway, what's the idea behind the two identical blades? I assume you could put different edges on them, but I'm not sure how that would be an advantage, especially for cleaning small game, since it's labeled Small Gamer on the box. Also, the main blade says Improved Muskrat. What's improved about the 77OT?