How do you decide where to put your pins? I was taught to eyeball pins and put them where they look right, not to measure. I have also been told to divide the handle in 1/4ths. If a handle has some belly on the bottom but not on the top that would place your pin lower in the center of the handle. Do you ever place pins out of center? The two places that seem a little off is the back pin (I would prefer to move it closer to the butt of the knife) and the center pin (seems low). I will try to post a picture but wanted to know how you determine where to place your pins.