Will be reshafting an old but nice set of PING Eye2+ irons with Recoil 60 grams shafts (F2) senior flex. Currently have TT Dynalite )R-flex) in there; but too heavy (110+ g) and stiff for my slower swing. Was told that I'll need to add 4-6 grams to each head (5-PW) to compensate for the lighter graphite Recoil shaft. Am assuming that each iron head gets a different amount of grams added...True? Also advised to use lead tape in the cavity as opposed to shaft weights in the tips. Any thoughts. THX