Titleist doesn't sell by the set, so you can order as many or as few clubs with whatever shaft they offer. You can mix AP2 with CB, MB, or T-MBs to your heart's content. Some large retailers may lead you to believe otherwise. My pro shop/AFC orders whatever we decide works best for me. I recently added a 5I because I can now hit it. My original set from the first fitting was 6-PW. My #1 reason why Titleist is the best at service.