Anyone have this product? Like it? Hate it? I'm running 33x12.5's on my 2008 but will be lifting soon and going with 35's. My speedo's pretty much on right now...I'd like to keep it that way when I go to the bigger tires. I'd like to keep my odometer accurate too. Does anyone know if this will adjust shift points to compensate for the bigger tires as well? Any info on this one or any other products that would do the what I'm asking for would be appreciated. Thanks!