This is great , good info to apply to our never ending quest for " perfect arrow flight " . I' d like to add some questions here . If you keep the center shot the same and use a stiffer spine will the arrows walk to the left with a right hand , compound , release shooter . With the resent threads on broadhead tuneing in my mind arrow spine seems to be about the most critical aspect that is easyly changed to correct poor flight " with broadheads " . Since easton says bare shaft tuneing is for finger shooters does that mean it does not aply to release shooters ? I' ve heard others say they use it with releases . And lastly [ not to open up anoter can of worms ] but if trying to get broadheads and field points to hit the same is' nt viable , why does easton list it as a tuneing method ?