I have only played the i20s for a few rounds and I just added some lead tape to the heads but with these CFS shafts, these clubs are just too light for me. I'm going to game them one more time before I reshaft or sell them, but I just wanted to know what any of you have used in place of the stock shafts... I love the technology and design behind them, I just think adding a little more weight may help. Thanks for any advice!