I recently got my driver re-shafted with a frequency fit shaft and I am extremely happy with it. My spin rates are in a good spot, my launch is better, and my club-head speed went up along with better accuracy. I then started wondering about whether or not I should get my iron shafts fitted. Is it just as important as driver? Also anyone who has had irons re-shafted/fitted I would love to know differences in performance.