BG, I think it is cool that you are in a library and that you are carrying on an intelligent conversation with people 3 and 4 times your age. I also applaud your taste in steel. I've been collecting since the age of seven and still love it so don't give up on anything you really love. But as a teacher I can't help being a little pedantic. So here goes:
If, by splitting hairs, you mean dividing your attention between two things then you are using the idiom incorrectly. Splitting hairs means ..... If people split hairs, they concentrate on tiny and unimportant details to find fault with something. Or maybe you mean something else. When I am sharpening a blade I split lots of hairs to make sure I have the edge I desire. In any case. Keep up your schoolwork and don't lose your interest in knives. It can be a rewarding, if expensive, pastime
Good Luck