I have a set of 680 MB irons that I am in love with and have had for MANY years. I am looking at "upgrading" them rather than going through the process of buying new clubs. I currently have the stock TT S300 shafts in my irons and I am looking at re-shafting them. Anyone out there know the best shaft out there for them? I have been looking at some different options lately, but don't know really the best. Also, any ideas for new shafts for my two wedges as well? Come on Team Titleist members, any and all help/suggestions are greatly appreciated.