I used to, many moons ago . Lotta work(as you are seeing) involved to tweak them just the way I wanted and they didn't seem to give me the advantage that I needed. I guess they are around the net if one really wanted them. I have replaced them with just trying to watch as many games as possible (easy with NFL ticket), trying to not factor blowouts or unique/freak situations, weather in my final evaluation thoughts. And am leaning more & more as years go by to my gut feeling and common sense. Been at this a long time...........sometimes stats are, well, just stats. Not saying stats are for losers, tho, far from it.