I have been using the old faithfull DCI 990's 3-PW DG S300 for about 7-8 years now. I play about 40 rounds per year to a 7-8 handicapp, great clubs and don't want to give up these irons (i have had the shafts spined, and lie adjusted 1 degree up with my 3-4,PW irons bent 1 degree strong) what are you thoughts on shafts wearing out. Is this a non concern or if i plan on using them for a few more seasons should i look at replacing the shafts? I would love to get into a set of 710CB's but not in the cards at this time. Any thoughts??