At a recent outing, I won a certificate for a set of new, non-custom KBS iron shafts (4-PW). I currently have the TT Dynalite Gold XP R300 in my AP2's (5-PW, W). As the title above asks, does it make sense to resift my current irons with new KBS shafts? If so, which KBS shaft would give me similar characteristics to the TT Dynalite Gold XP R300's?