You are supposed to set just for example you set 20 and 50 pins then the yardage between would be automatically set I don't buy into to it but I guess I could be possible. I mean what are they basing the math on. I will do the old fashion do it yourself and know for sure. O yea and according to there web site if the yardage is not correct then you have a form problem no thank you but as long as they are happy with them my opinion is just my 2cents