I am very interested in upgrading my 915 Driver, Fairway, and Hybrid to custom shafts. Would greatly appreciate some insight on the differences between Tour AD DI and Aldila Rogue Black. If anyone has any experience in hitting either of these shafts, please let me know. Are the extra costs truly worth upgrading? (I understand there's many factors to be considered, i.e. clubhead speed, launch angle, how often one plays, etc.). However, which shaft is preferred? Thank you.