I have a brand new set of AP1's that are R300 shafts and I want the S300 shaft. These clubs were won in an invitational. Can they be exchanged for the Stiff shaft? They are unused, new, still in the box, still wrapped in plastic......How can I go about an exchange? cant seem to get much help locally? Didnt realize they were regular flex (although suppose to have recieved stiff shaft) until I got them home..