I don't paper tune. I do just eye ball center shot (A really really good job, every bow I have ever shot is center shot when the arrow is behind the string when the string is in the middle of the handle (Is not the case with short ATA length bows)). However, bare shaft tuning doesn't tell you whether you bow is center shot (someone will fight me on this but I'm right). There are specific methods for this (Paper tuning doesn't tell you either). I will get my arrows spined close, then I set the center shot, then I bare shaft again to get the spine right on the money.