The Karsten cheek piece is the way to go. Just make sure you don't order a stock that is too long in the first place, most do. Non-NBA types are well served by a 13in LOP, most more like 12.5/12.75.
I disagree, I am 6-1 and 13.5 is short for me. 14" is a better fit and even that my scopes are pretty far forward when mounted.
