I am totally new to skiing...been a snowboarder since 92, and thought I'd give skiing a try, as I used to like playing on snowblades. Anyway, I bought a pair of K2 Public Enemy's, and plan on trying everything out...all mountain if you will. I noticed that the sidewall of the ski has markings on it that show core centre, and numbers back from there. My question is this...where should the centre of the boot line up with these numbers for the bast all around riding? Any help is greatly appreciated.