I am looking at installing a set of shafts into my 712 AP2s, and these shafts were pulled from another set of irons. What I want to know is how much longer will the playing length be over the length of the uninstalled shafts? I know the standard playing length of the clubs as listed on the website...what I want to know is how much to I need to add to the length of the uninstalled shafts to determine what the playing length will be?