Arthur explained it the way I often use it. You will hear me use this term at times. Basically what I mean when I use it is that if you have paper tuned, bare shaft tuned and group tuned your bow, rest and arrows and they shoot as well as you can then it is tuned the best you are going to get it in my opinion. Now if you discover it will not group field points and your broad heads in the same exact spot and this is your ultimate goal then you will have to re-tune the bow to accomplish this. And in some cases you may actually be DE-tuning your bow to get these results. It would depend on how far off your spine was since this is what normally effects where your arrows impact.

Whether it is enough to make a difference to you depends on what your ultimate goal is with the bow and how well you shoot to begin with.

Paul